SCROLL NEWS / DISCOVERY
Search headlines
Find the stories shaping the conversation.
Results for " lem " 6,196 found 🔀 AI-powered Shuffle
NBC's 'Line of Fire' is what happens when you combine a procedural TV show with a soap opera
TV creator Joshua Safran is introducing "Line of Fire," a new NBC show blending elements of a crime procedural with a soap opera | WBBM Newsradio 780 AM & 105.9 FM
NBC's 'Line of Fire' is what happens when you combine a procedural TV show with a soap opera
TV creator Joshua Safran is introducing "Line of Fire," a new NBC show blending elements of a crime procedural with a soap opera | 1010 WINS
NBC's 'Line of Fire' is what happens when you combine a procedural TV show with a soap opera
TV creator Joshua Safran is introducing "Line of Fire," a new NBC show blending elements of a crime procedural with a soap opera | KCBS All News 106.9FM and 740AM
New initiative brings entrepreneurship beyond the business world at PVAMU
PRAIRIE VIEW, Texas (Sept. 21, 2026) – For a student studying engineering, education, health care or another field, entrepreneurship can be more than building a business. It can mean recognizing an opportunity, solving a problem and finding a new way forward. That idea is
Kyle Whittingham sounds alarm over Michigan's turnover problem
Michigan football ranks low in turnover margin. Coach Kyle Whittingham says the team must fix its fumble issues.
Studs and duds from Eagles’ last-second victory over Titans
DeVonta Smith and Darius Cooper delivered late, while turnovers and the running game created problems in the Eagles’ win over Tennessee
Paramount to Resolve Antitrust Lawsuit, Clearing the Way for Warner Bros. Acquisition
The deal would remove the last significant hurdle the media mogul David Ellison faced to create a news and entertainment empire, home to movie studios, HBO, CBS and CNN.
Why Aaron Boone could be in postseason 'hell' with Yankees
This could become a major problem for Boone and the Yankees.
MBARI and Synchro Join Global Workshop to Tackle Deep-Sea Science Challenges
MBARI and Synchro staff joined nearly 70 experts from 22 countries at the Deep Ocean Collective Solution Accelerator, a four-day DOOS-convened workshop at Scripps Institution of Oceanography focused on biodiversity data access, affordable ocean technology, seafloor video analysis, and BBNJ Agreement implementation.
Scientists Just Found Evidence That Ancient Egypt Had a Female King 5,000 Years Ago
Researchers enhanced a decades-old photograph and found a royal emblem suggesting Meretneith ruled as a king, not merely a queen.
The Nurse Is Health Care’s Most Underpriced Founder
They see the problem first, build the fix, and decide whether it is ever adopted. The market has trained them to hide the one credential that de-risks the deal.
Two new books from SPIA faculty tackle the politics behind healthcare and global investment | School of Public and International Affairs
Growing up in Peru, Zoila Ponce de León saw disparities in access to healthcare from a young age. She may not yet have had the language for it, but she was already asking the questions she would spend much of her early career working to answer: Why is it so difficult to access healthcare? And why, when these problems are so widely recognized, won’t politicians do more to change the system?
Two new books from SPIA faculty tackle the politics behind healthcare and global investment | School of Public and International Affairs
Growing up in Peru, Zoila Ponce de León saw disparities in access to healthcare from a young age. She may not yet have had the language for it, but she was already asking the questions she would spend much of her early career working to answer: Why is it so difficult to access healthcare? And why, when these problems are so widely recognized, won’t politicians do more to change the system?
Implementation of 2025 Reconciliation Law: Medicaid Managed Care Rate Setting Uncertainty & Potential Plan Exits
This policy watch examines recent and anticipated managed care rate setting challenges and the potential implications of MCO exits.
CECAS recognizes inaugural Global Scholars and Dean’s Scholar Fellows
Those recognized were: Shane Abercrombie, Sumter Archer, Tiffany-Marie Baako, Colleen Clarke, Kylie Folkes, Bryson Hedrick, Sara Henry, Joshua Hoggatt, Taylor Hopkins, Azrin Jamison, Mengdi “Hansen” Li, Robert Lowery, Quincey Miller, Ben Simon, Madison Smith, Arabella Stockdale, Steven Szachara, Tianke “Kirk” Wang and Aidan Wolynn.
Belichick lands North Carolina football in headlines. Is the turmoil worth it?
Bill Belichick's tenure at North Carolina is under scrutiny after a recent loss to Clemson.
Noise pollution is a serious but often forgotten public health problem
Creating a quieter environment can improve your health – but you have to know what you’re listening for.
AMC's debt buyback depends on securing at least $3.97 billion
Noteholders can receive $1,009.70 per $1,000 plus accrued interest. The offer expires Sept. 30, with settlement expected Oct. 5 if conditions are met.
You can now claim your payout from Apple’s $250 million Siri settlement
The major class action lawsuit against Apple over Siri and Apple Intelligence delays continues to progress. Apple is expected to...
Environmental Science Takes an Average of Seven Years to Influence International Policy, Study Finds
A study led by the University of Alicante (UA) and the Mediterranean Centre for Environmental Studies (CEAM) analyses the barriers separating scientific knowledge from environmental policy and its effective implementation.
Apple Siri settlement claims window now open. How to file for money
Some iPhone users may be eligible to claim money from a $250 million Apple settlement. Here's who's eligible and how to file.
MORNING BUSINESS REPORT: Paramount settlement, parents rely on family for money, CT foliage rank
Paramount looks to settle antitrust lawsuits, more parents are relying on family to make ends meet, and where CT ranks for foliage. Here's the Morning Business Report for Sept. 21.
Nike stock struggles: Kylian Mbappe's On move signals deeper problems
Losing the soccer superstar caps a long streak of issues, including weak China sales and bleak guidance.
Cole Palmer withdraws from England squad after earning Tuchel recall
Chelsea midfielder Cole Palmer has withdrawn from the England squad for the upcoming international break as his workload and a muscle problem are managed.The 24-year-old had been recalled by England m...
Opinion | Ed Sheeran, Macklemore and Why Politics Is So Hard for Celebrities
Celebrities use the facade of neutrality as shelter, as a place to take refuge.
NC leaders call Chemours deal historic, but nearby well owners are still skeptical
Residents in Cedar Creek and Gray’s Creek say the $590 million PFAS settlement will matter only if it produces reliable, safe drinking water.
Bruno Genesio provides Igor Paixao injury update
Olympique de Marseille did everything to retain Igor Paixao (26) over the summer. Amid the club’s financial problems, the ownership looked to offload the Brazilian in the closing days of the transfe...
Whether you like it or not, celebrities have an impact on politics
The global groundswell of support for Macklemore’s pro-Palestinian advocacy serves to remind us that maybe celebrity activism really is that deep after all, writes Cheek’s Varsha Yajman. Subscribe In the last week, publications, podcasts, and influencers that have either rarely or never spoken about Israel’s genocide in Palestine have flooded my social feed. And it was all because singer Ed Sheeran and his team dropped Macklemore as his opener for saying “Free Palestine” on stage. Millions raised, millions speaking up in support of Palestine - all of this confirming my view that, whether I like it or not, celebrities do have an impact on political outcomes. And this is interesting when much of the time celebrity activism can induce an eye roll - I love to see Charli XCX pointing out a Palestinian flag in the crowd, but it’s hardly the bold symbol of allyship that some fans would make it out to be. But there’s a line between healthy scepticism and outright dismissal - and I’d argue that the latter lets the rich and powerful off far too easily. For instance, actress Jennifer Lawrence, once outspoken about her political views, last year told The Times she no longer believes celebrities have a role to play: “Celebrities do not make a difference whatsoever on who people vote for. So then what am I doing? I’m just sharing my opinion on something that’s going to add fuel to a fire that’s ripping the country apart.” While it’s a narrative she might find comfort in, it simply is not true. Grassroots movements often garner worldwide attention when celebrities and other high-profile spokespeople bring a mainstream platform to their causes. And this frustrates me. We have had three years of a live-streamed genocide. Macklemore himself has been calling for a Free Palestine long before he booked the Sheeran concert. Yet it’s the high-profile fallout of the last week that finally seems to have made saying “Free Palestine” socially acceptable in the mainstream. It feels like the collective mood has shifted, where calling out censorship is now the obvious response - not just the business of ‘radical’ activists. To recap, Sheeran’s decision followed an ultimatum from billionaire Robert Kraft, owner of Gillette Stadium, one of the venues Sheeran was scheduled to perform at: either drop Macklemore as your opener after only two of the eight scheduled shows, or you do not play at any stadiums. Sheeran’s disappointing decision to stand on the side of billionaire-led censorship has ultimately seen a surge in support for Free Palestine. It began when all his openers and his backing band pulled out of Sheeran’s tour, in solidarity with Macklemore and with the Palestinian cause. It was met with an uproar of support from those who had never or barely touched politics before: influencers lip-syncing to Macklemore’s music, singers like Jack Antonoff singing “Free Palestine,” and publications and podcasts standing with Macklemore. And finally, we saw material support: Macklemore donated $1 million in profits from his two nights opening for Sheeran’s tour to several Palestinian aid groups and called for Sheeran and Kraft to match it, which they have since promised to do. We’ve also seen children’s entertainer Ms Rachel follow suit with a $1 million donation to Palestinian aid, and publication PopBase has donated $10,000. Anera, a humanitarian aid group working in Palestine, Lebanon, and Jordan, said donations since Macklemore’s announcement were more than triple this month’s daily average. The group’s Instagram page has also gained 8,000 followers. Macklemore far from the first celebrity to speak and participate in politics in the Western World. In 1924, singer Al Jolson supported Republican candidate Warren G. Harding for president, and decades later, celebrities such as Harry Belafonte, Lena Horne, and Aretha Franklin voiced their public support for the Civil Rights movement. More recently, in the lead-up to the 2024 US election, ‘The Daily Show with Trevor Noah partnered with the organisation Power the Polls to recruit poll workers to address shortages- a problem disproportionately affecting voters of colour. The campaign saw 170,000 new sign-ups - 35,000 of which came directly through the TV show’s link - resulting in the recruitment of 713,000 total poll workers that year, an almost three-fold increase on the organisation’s goal. Alongside recruiting workers, celebrities in the US (where voting in elections is not compulsory) have made a huge difference by calling for people to register to vote. Taylor Swift’s endorsement of Kamala Harris in 2024 saw over 400,000 visitors on the voter registration site within 24 hours of her Instagram post. In 2023, Swift had urged her fans to register, resulting in 35,000 new voter registrations. Similarly, Ariana Grande promoted voter registration in 2019 by setting up booths at concerts on the American leg of her tour, resulting in over 33,000 voters registering. And the same thing is happening closer to home. This year, musician Jack River successfully called for government action to ensure creatives in Australia do not have their work scraped by generative AI companies. Celebrity as the mediator between the punter and the politician Celebrity activism isn’t just a feel-good news story - research tells us it actually makes a difference. By directing attention to issues affecting the average person, like voting inaccessibility or a lack of action on a genocide, researchers Alfred Archer and Amanda Cawston state that “celebrities can play a useful bridging role between political elites and the people they represent”. Alternatively, in a world where talking about politics is “not cool,” or where people lack exposure or knowledge to engage with politics, celebrities can act as an educational resource or an entry point into the political world - when they speak up about an issue, their audience gets exposed to it. Olivia Rodrigo’s Daisy Chain Fields festival is a perfect example. Rodrigo partnered with twelve organisations focused on women’s issues, such as reproductive rights. These organisations had stalls at the festival for people to meet them and were also featured heavily on social media, giving their issues global attention and raising $20 million for the organisations. We have also seen celebrities at award shows such as the Emmys wearing F*CK ICE pins, referring to the U.S. Immigration and Customs Enforcement’s treatment and detainment of people - generally people of colour. When celebrities speak up about political issues in public forums, they put the issue at the forefront of mainstream media, rally their supporters, and make it clear that, however much they disagree, the government cannot simply ignore it. Our over-reliance on celebrities versus our politicians As much as I love seeing my favourite celebrity use their platform for a good cause, there is an important question to ask: not whether celebrity activism is good or bad, but whether we should have to rely on celebrities. And the answer would, in an ideal world, be no. In an ideal world, or merely a just world, action on Palestine would’ve happened decades ago, climate change would be taken seriously, and most importantly, people would understand their democratic rights. However, that is not our reality. Only around 28 per cent of Australian Year 10 students reach proficiency in civics and citizenship. In the US, almost two-thirds of people under 30 say high school civics education didn’t prepare them to understand voting deadlines, how to research candidates, or how to vote by mail. When civics education is weak, our trust in these institutions and our understanding of change-making processes also decline. This is where celebrity steps in and becomes our main source of reliance. As Mary R. Connelly notes in _The Tartan, “_Celebrities will always be involved in campaigns in one form or another, but their presence is not what causes people to vote blindly. The lack of political engagement and literacy is what allows celebrities to wield their influence on the political sphere so impactfully.” About the author Varsha Yajman is the Digital Content Producer at Cheek Media. She is a youth advocate and lawyer with a background in climate litigation and is passionate about looking at the intersection between race, climate justice, and mental health. Thanks for reading Cheek Media Co. ! This post is public so feel free to share it. Share
The Liquid Biopsy That Found Pancreatic Cancer Early Has a Bigger Regulatory Problem Than Its Science
PANXEON detects stage 1-2 pancreatic cancer with 87% sensitivity, but FDA's companion diagnostic pathway may be the bigger obstacle to clinical adoption.
The Enzo Fernandez problem that Man City must solve
City’s thrilling 5-3 win over Sunderland demonstrated the strengths and weaknesses of their £125m man – and left you wondering whether he was really what Enzo Maresca’s side needed
If you really hate it when music and film stars do politics, here’s the answer: give us politics that works
The problem is not famous people speaking out, as they always have. It is the feeling that leaders have failed, obliging celebrities to fill the vacuum, says Guardian columnist Nesrine Malik
Should you trust an AI doctor? Relying on Gemini for health advice could be fatal
A fake disease, complete with absurd clues and a fictional laboratory aboard the USS Enterprise, was enough to fool AI chatbots—and even find its way into the scientific literature. The hoax exposes a deeper problem: AI can sound authoritative without knowing whether the information it has absorbed is true.
Paramount, California AG discuss concessions including $1.5 billion investment, WSJ reports
Sept 20 (Reuters) - Paramount and California's attorney general have discussed a range of concessions in advanced settlement negotiations, including a $1.5 billion investment in production in the
A Shorter Apple Pencil Was Supposed to Launch Alongside iPhone Duo
A shorter Apple Pencil for the iPhone Duo was in development, but Apple scrapped it due to "technical problems ahead of mass production," according to Bloomberg's Mark Gurman. A shorter Apple Pencil for the iPhone Duo was in development, but Apple scrapped it due to "technical problems ahead of mass production," according to Bloomberg's Mark Gurman.
CW@60: AI will change the economics of business more profoundly tha...
I have spent most of my working life watching technology change what it means to run a business.
Siri AI Settlement Website Now Live: Apple to Pay Some iPhone Owners
In May, Apple agreed to pay $250 million to settle a U.S. class action lawsuit over Siri AI's delayed launch, and the settlement website is now live. Apple will pay an estimated $25 per eligible iPhone to eligible customers, who can submit a claim via the settlement website between September 21 and December 21 of this year. The exact payment may be higher or lower than $25 depending on the total number of valid claims submitted and other factors, with the maximum amount set at $95.
Skyy Moore May Have Solved Packers' Special Teams Problems
Skyy Moore’s explosive 208-yard performance against the New York Jets shattered years of stagnant returns for the Green Bay Packers.
The School Bus Driver Shortage Gave a 62-Year-Old With $260,000 Saved What His Nest Egg Couldn't: Health Insurance Until Medicare
For pre-Medicare retirees, the gap between 62 and 65 can quietly swallow a shocking portion of a nest egg before a single lifestyle expense hits. One overlooked job category is quietly solving that problem for thousands of early retirees.
Trump Gets Caught in a Dilemma Over a Saudi Plea for Military Help
The president vacillated but decided on Sunday not to join Saudi Arabia, for now, in joint strikes against the Houthis in Yemen. But he also needs the kingdom’s cooperation in his war against Iran.
Oil rises after Houthi attack on Saudi capital
Oil prices rose on Monday after Yemen's Iran-backed Houthis launched missile and drone strikes at Saudi Arabia's capital Riyadh on Saturday, escalating tension in the Middle East while the US and Iran remained in stalemate.
Pulisic on ‘difficult 2026’ as Saelemaekers says Milan ‘enjoyed ourselves’
Christian Pulisic admits he had a ‘very difficult’ 2026 for Milan and the USMNT, but broke his goal drought after nine months, while Alexis Saelemaekers said they ‘enjoyed themselves’ against ...
Robert Kraft set a ‘powerful example’ with Macklemore ban, political analyst says
‘Fox News Sunday’ panelists discuss the Michigan U.S. Senate race, the controversy involving Ed Sheeran and Macklemore and the future of the Kennedy Center in Washington, D.C.
Opposition grows to Paramount-Warner Bros. merger settlement as the Hollywood deal enters a critical week
Paramount-Warner Bros. merger deal faces a critical week ahead
Familiar late-game problems return in Ravens’ home-opening loss
Baltimore was outscored 15-0 in the fourth quarter and squandered an eight-point lead during a 24-17 loss to New Orleans.
Finneas Drops Out of Ed Sheeran Tour After Macklemore Was Removed
Finneas was set to perform as a supporting act for select dates of Ed Sheeran's tour later this year.
Ed Sheeran's Cousin Slams Singer, Calls Him a 'Coward' Amid Controversy
Ed Sheeran's cousin is publicly condemning his famous family member amid the controversy surrounding the decision to unceremoniously remove Macklemore from the singer's Loop Tour for his unapologetic support of the Palestinian people.
Ed Sheeran's Cousin Slams Singer, Calls Him a 'Coward' Amid Controversy
Ed Sheeran's cousin is publicly condemning his famous family member amid the controversy surrounding the decision to unceremoniously remove Macklemore from the singer's Loop Tour for his unapologetic support of the Palestinian people.
Which side Is Ed Sheeran on?
He addressed the Kraft-Macklemore uproar at a show last night—but some topics have no safe middle ground.
Ebola outbreak update: Cases and deaths; Dungu health zone, Haut-Uélé province now affected
A total of 73 new confirmed cases of Ebola Virus Disease (EVD) were reported on September 18, 2026, including 25 community deaths. Of these confirmed cases, 46 were from Ituri province, 18 from North Kivu, 6 from Haut-Uélé, and 3 from Tshopo. A new health zone, Dungu, in Haut-Uélé province, was affected during the day. As this zone borders South Sudan, strengthening cross-border surveillance is necessary. During the day on September 18, 2026, 12 deaths within Ebola Treatment Centers (ETCs)—10 in Ituri and 2 in North Kivu—were unfortunately recorded, bringing the total number of deaths for the day to 37. However, 41 patients were declared recovered (30 in Ituri, 6 in Haut-Uélé, 3 in North Kivu, and 2 in Tshopo) after testing negative for EVD twice. Since the start of the epidemic in the Democratic Republic of the Congo (DRC), a cumulative total of 7,614 confirmed cases, including 3,676 deaths, has been recorded, representing a case fatality rate of 48.3%. The epicenter remains Ituri province, which accounts for 77.2% of the confirmed cases reported across the seven affected provinces and also accounts for 63.0% of the new confirmed cases. A new health zone was affected on September 18, 2026. Consequently, 63 out of 167 health zones (37.7%) across 7 provinces are affected. Subscribe to Outbreak News TV on YouTube Response measures feature 97% traveler screening at entry points, surveillance expansion to new area Dungu, and community outreach sensitizing over 110,000 people in one day. The Democratic Republic of the Congo’s health system faces deep, structural constraints that predate the current Ebola outbreak and make epidemic response far harder. These problems are most acute in rural areas and the conflict-affected east. Outbreak News Today is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber. Subscribe Eastern provinces have seen health facilities damaged, looted, or abandoned. Insecurity delays patients, blocks supply deliveries, and exposes staff to attacks. Millions of displaced people live in camps with poor water, sanitation, and health services, increasing outbreak risk. Vast distances and poor roads mean many people walk hours or days to reach care. These same weaknesses explain why Ebola has continued to spread into new, under-prepared health zones even as some original hotspots show improvement: surveillance, laboratory turnaround, contact tracing, and infection control remain thin outside the best-supported sites. The Ministry of Health and partners have scaled up treatment centres, laboratories, and vaccination in the current outbreak, and some digital surveillance systems (DHIS2) provide a useful backbone. However, the underlying gaps in staffing, basic infrastructure, reliable funding, and logistics have not been closed. Without sustained investment in those foundations, the system will remain vulnerable to both routine disease burden and the next large outbreak. If you like the reporting on Outbreak News Today, please consider a paid subscription for $5/month or $30 a year. Help support the cause of this niche journalism. It is appreciated.
WATCH: 1-on-1 with Dabo Swinney after Clemson’s conference-opening win over North Carolina
WATCH: Palmetto Sports Director Carmine Gemei speaks 1-on-1 with Coach Dabo Swinney after Clemson’s conference-opening win over UNC in his freshman quarterback Tait Reynold’s first start.
Nate Sheppard Has Caused More Problems for an Opponent
Duke running back Nate Sheppard has created some more problems for a Blue Devils' opponent.
Ms. Rachel Says Ed Sheeran Caved Over Macklemore Exit
The children's educator says Sheeran failed a moral test after venues reportedly threatened to block Loop Tour dates featuring Macklemore.
Ed Sheeran addresses Gaza and Macklemore controversy at Philly tour stop
At his first concert since controversy roiled his North American tour, Ed Sheeran said he is "deeply...
D.C. to BC: The Politics of Voting From Your Dorm
While the 2026 midterms will not see Trump’s proposed changes, the problem for college students goes well beyond the role that the Postal Service ought to play in elections. Navigating voting from college is an arduous task. Out-of-state students face three deceptively simple questions: Where do I live? Where should I vote? How do I vote?
Ed Sheeran addresses Gaza and Macklemore controversy at Philly tour stop
At his first concert since controversy roiled his North American tour, Ed Sheeran said he is “deeply worried” by venues influencing performances after opener Macklemore was fired from the concert
Why politicians should pay more attention to the polls (reprise)
Welcome to the 231st edition of The Week in Polls (TWIP), a polling newsletter that always welcomes new readers. So please don’t keep TWIP a secret; share it with your friends and colleagues: Share The Week in Polls With all the stories swirling around Reform, JL Partners and political polling, I am finally tearing myself away from talking about the regulation of polling this week - and instead re-running a previous piece reminding us why the solution to problems with polls isn’t simply to ban or ignore them. Rather, we need them to play a vital role in making our politics - and politicians - better. This is followed by summaries of the latest national voting intention polls, seat projections from MRPs and the most recent party leader ratings. Subscribers who pay for the full edition can also read ten insights from the latest polls and analyses, including: A trio of organisations and a pair of professors have been casting their eyes over the Liberal Democrats ahead of the party’s autumn conference; What impact did the summer heatwave have on views on climate change? and Which wins out between chocolate and cheese? If you are not yet a paid subscriber, you can read all ten by starting a free trial now: Get FREE 7-day trial For more polling news as it comes in ahead of next week’s edition, you can also follow The Week in Polls on Bluesky. Picking up on my doubt last week about whether or not 35% of British train travellers have tried to order a takeaway for delivery to a railway station or carriage, thank you to reader Iain, who has been in touch to say he has done just that… in India. Another quick pair of updates, this time on the controversies around Reform and polling. Politico has a further scoop - “Farage aide caught in donor sting attended Egypt retreat with JL Partners” - and Ian Dunt has written about the problems with polling too: “Seeing the response of many polling experts in the last few weeks suggests that they are nervous about what is happening and keen to mitigate against it. Seeing the response of journalists, which has been basically non-existent, suggests the precise opposite.” My usual reminder as well: please do hit reply if you’ve spotted a poll, focus group or new piece of poll-based research that you think should be in contention for coverage in a future edition. Thank you! And with that, on with the show. How politicians get public opinion wrong I have written before about the benefits that come from widespread availability of high-quality political polling. We need more polls and more good coverage of polls. However, what I’ve not dug into before is the research into how accurately politicians estimate public opinion on issues. Thankfully we have academic research to tell us. First, the bad news: We present results from a study of 866 politicians in four countries.1 Politicians were asked to estimate the percentage of public support for various policy proposals. Comparing more than 10,000 estimations with actual levels of public support, we conclude that politicians are quite inaccurate estimators of people’s preferences. They make large errors and even regularly misperceive what a majority of the voters wants. Politicians are hardly better at estimating public preferences than ordinary citizens. Walgrave, S., Jansen, A., Sevenans, J., Soontjens, K., Pilet, J.B., Brack, N., Varone, F., Helfer, L., Vliegenthart, R., van der Meer, T., Breunig, C., Bailer, S., Sheffer, L. & Loewen, P.J. (2023a), “Inaccurate Politicians: Elected Representatives’ Estimations of Public Opinion in Four Countries”, The Journal of Politics, 85(1): 209-222. The bad news is not quite as bad as that makes it sound because, when asked whether the majority of public opinion was for or against various policies, politicians picked the wrong option ‘only’ 29% of the time. However, this included getting it wrong even when public opinion is far from evenly split on an issue: They do not only get it wrong when the public is divided and hard to read (e.g., when there is a 51%:49% distribution). Seventy percent of the misplacements occur for policies with a relatively clear distribution of at least 60% (dis)agreeing citizens. Moreover, the public scored only slightly worse than politicians, picking the wrong option 2.7 out of 8 times on average, compared with 2.3 times for politicians. Turning to the other measure of accuracy (not which side is in the lead but what the percentage support is for each side), politicians on average were 18 percentage points out in their guesses. Again, this was only slightly better than the public, whose error came in at 21 percentage points.2 Further research, using the same mix of countries, gives a little more comfort about how (in)accurate perceptions are: We show that politicians have a better understanding of public opinion when they think the issue matters to voters. Further, when an issue is personally important to politicians they more accurately estimate their party supporters’ opinions. The results confirm that politicians hold more accurate perceptions of voters’ preferences when they think it is important to do so but not necessarily when the issues actually are important to voters. Butler, C., Walgrave, S., Soontjens, K. & Loewen, P.J. (2024), “Politicians are better at estimating public opinion when they think it is more salient”, Party Politics: 1–13. Even so, it’s not a good picture. The remedy for this? Politicians should spend more time reading the polls. So forward this newsletter to someone you know… Share For a more general argument against banning polls, see my 2024 piece. Is “Let Bartlet Be Bartlet” good advice or not? The latest episode of my Political Fictions podcast heads across the Atlantic for a dip into one of the political TV classics: Mark and Cory talk about a giant of American political drama for the first time this week, as they tackle The West Wing. They talk about Let Bartlet Be Bartlet, the nineteenth episode of series one. In it, Mark wonders if The West Wing is actually the epitome of the “Boris Johnson school of politics”, Cory outmanoeuvres Mark into confirming we will record a Christmas Special about Love, Actually and they debate whether the central message of this episode has been misunderstood. Cory’s email newsletter is Paperback Rioter and Mark has a family of email newsletters. Subscribe to our newsletter for some additional bonus content and to get alerted whenever a new episode comes out. Our theme tune is “Monkeys Spinning Monkeys” by Kevin MacLeod/incompetech.com and licensed under the Creative Commons: By Attribution 4.0 License. You can also listen to our episode on Apple Podcasts, Spotify, the web or YouTube. Elsewhere from me… [ A Lord's Eye View How to fix the problem of money in our politics Welcome to my latest update on work in the House of Lords. This time I am taking a look at how our political system is regulated, and the protections we need to keep democracy safe from becoming simply a contest to see who has the biggest bank account… Read more 5 days ago · 3 likes · 2 comments · Mark Pack ](https://lordseyeview.substack.com/p/how-to-fix-the-problem-of-money-in?utm_source=substack&utm_campaign=post_embed&utm_medium=web&embedding_publication_id=1269283) If you spot a factual error… Borrowing an idea from Stuart Ritchie and others, if you spot a factual error in an edition of this newsletter, I will give you a free 12-month subscription to the paid-for version (or an extra 12 months on your existing one). Factual errors qualify, but grammatical errors or disagreements over interpretation do not, and my decision is final. Messages about both of those are always welcome, though. Voting intention and leadership ratings Here are the latest voting intention polls from different pollsters. It is all pretty static at the moment, with a small and consistent Labour lead in nearly all the polls. The table is also online here, along with explanations about what is included. It is updated regularly throughout the week as new polls are released. Next are the seat projections from MRPs, also sorted by fieldwork dates, listing those which are based on dedicated fieldwork (rather than models based on averages of other polls). Because such MRPs are published infrequently, some of the entries below are quite old. Finally, here is a summary of leadership ratings, with a graph from PollCheck: Detailed numbers from the latest polls are online here, and both that and the graph are updated regularly throughout the week as new data comes out. For historical figures on both voting intention and leader approval stretching back to the 1930s, including Parliamentary by-election polls, see PollBase. Catch up on the previous two editions [ ](https://theweekinpolls.substack.com/p/a-crisis-point-for-political-polling) [ A crisis point for political polling Sep 13 ](https://theweekinpolls.substack.com/p/a-crisis-point-for-political-polling) [ Read full story ](https://theweekinpolls.substack.com/p/a-crisis-point-for-political-polling) [ ](https://theweekinpolls.substack.com/p/extra-questions-about-the-polls-in) [ Extra questions about the polls in Reform’s funding scandal Sep 6 ](https://theweekinpolls.substack.com/p/extra-questions-about-the-polls-in) [ Read full story ](https://theweekinpolls.substack.com/p/extra-questions-about-the-polls-in) My privacy policy and other legal information are available here. Links to purchase books or other items are usually affiliate links which pay a commission for each sale. Quotes from social media messages are occasionally lightly edited for punctuation and clarity. If you are subscribed to other email lists of mine, please note that unsubscribing from this one will not automatically remove you from the others. If you wish to be removed from all my lists, simply reply to this email to let me know. A quintet of Lib Dem polling analyses, and 9 other polling insights you shouldn’t miss The following ten findings from the most recent polls and analyses are only for subscribers who pay for the full edition, but you can sign up for a free trial to read them straight away. Ahead of the start of Liberal Democrat conference, we have a trio of organisations and a pair of professors with pieces out about Ed Davey’s party:
Inside the Fear, Anger, and Hope at Ed Sheeran’s Philadelphia Concert
The latest Loop tour stop drew heightened attention after a week’s worth of statements and fallout following Macklemore's removal from the tour
Man City win surprising thriller but Sunderland expose growing problem
Man City 5-3 Sunderland: Brian Brobbey ran City’s defence ragged and scored a hat-trick, leaving Enzo Maresca plenty to ponder – even in victory
To Your Good Health: Word-recall difficulty causes concern in 70-year-old female
Occasional tip-of-the-tongue word-recall problems are a normal part of healthy aging.
Ed Sheeran weeps onstage, admits to ‘making mistakes’ in first concert since Macklemore exit: ‘I’m so sorry’
The singer has been embroiled in controversy since Macklemore was removed for making pro-Palestine statements onstage.
Three takeaways from UNC’s wildly frustrating loss to Clemson
The Heels now have some big issue to sort out during the bye week.
Chinese Scientists Find Unexpected Solution To The Problem With Underwater Drones
The oceans are the last unexplored frontier on our planet, but when it comes to exploring them with drones and sonar, there's a bit of a problem.
Football Italia Show: Allegri infuriated, Lautaro silences the doubters
Serie A Round 5 already delivered two intriguing clashes, with Roma and Inter sharing the points in a thrilling 2–2 draw at the Stadio Olimpico, while Fiorentina and Napoli played out a 1–1 stalem...
How will California's new law restricting social media for kids work?
California will implement a new law in January that bans social media platforms from offering addictive features, such as infinite scroll, autoplay, and algorithm-driven "For You" feeds, to kids under the age of 16.
'I'm so, so sorry': Ed Sheeran speaks out at his first show after Macklemore controversy
Before performing in Philadelphia on Sept. 19, Ed Sheeran addressed the controversy surrounding Macklemore’s removal from the U.S. dates of his Loop Tour following pro-Palestinian remarks made onstage.
Leeds United and Crystal Palace clash ends in stalemate
Leeds United stretched their unbeaten start to the Premier League season to five games with a 0-0 draw at home against Crystal Palace on Sunday.With the side unchanged from Monday’s commanding win o...
Ed Sheeran Clarifies Gaza Stance, Again Blames Venues for Kicking Macklemore Off Tour
Sheeran called what’s happening in Gaza “catastrophic, unjustifiable, and disproportionate” but did not take responsibility for the rapper being removed from the show
Ed Sheeran apologizes for ‘mistakes’ in first show since Macklemore was removed from tour, other openers quit
Ed Sheeran opened his Philadelphia concert with a direct apology to fans — and addressed the Israel-Hamas war — after Macklemore was dropped from his U.S. tour.
Ed Sheeran Found New Band to ‘Stand on Stage With Me' After Controversy
Ed Sheeran performed with a new backing band during his Saturday, September 19, concert after his previous team left the Loop Tour in solidarity with Macklemore's controversial departure.
Chicago Athletic Association: Inside the private club turned hotel
I stayed at the Chicago Athletic Association, a historic gentlemen's club turned luxury hotel with Gilded Age charm and whimsical designs.
Famitsu review scores - September 20, 2026 - Fire Emblem: Fortune's Weave, more
The latest Famitsu review scores for the week of September 20, 2026 are as follows: Fire Emblem: Fortune’s Weave – 9/9/9/9 Marvel’s Wolverine – 9/9/9/9 Silent Hill: Townfall – 8/8/9/8 Derby Stallion 2 – 8/8/8/8 Sullyland Nursery Rhyme – 8/8/8/8 Gobble – 7/7/7/7 Patlabor the Case Files – 7/7/7/6 Solarpunk – 7/7/6/6 Note that for each review, four editors gave...
A Cloudy Climate Mystery Over Antarctica Has Scientists Rethinking Their Models
Researchers compare observations with leading climate models to identify errors and help improve future climate predictions. Some simulations put too many low clouds over the Southern Ocean, yet still underestimate how much heat reaches the surface below. Observations from an Antarctic research voyage suggest that fixing the cloud count alone will not solve the problem.
Mount Vesuvius Buried These Scrolls for 2,000 Years – Now Scientists May Read Them
Researchers recreated a damaged ancient scroll to test a new way to study the past. Lead in ancient ink could help researchers read the Herculaneum papyri, Roman scrolls buried when Mount Vesuvius erupted in 79 CE. Many are now too brittle to open, and reading them with X-rays poses its own problem. The ink and
Confirmed 2. Bundesliga lineups: Hannover 96 vs. VfL Bochum
Interim head coach Lars Barlemann makes two changes from the defeat in Nürnberg. Franz Roggow and Benjamin Källman replace Waniss Taïbi and Benedikt Pichler. Uwe Rösler makes one change from the ...
Mark Ruffalo urges California AG Rob Bonta not to 'cave' in Paramount-Warner Bros. merger fight
Mark Ruffalo urged California Attorney General Rob Bonta not to cave on settlement talks over the $110 billion Paramount-Warner Bros. Discovery merger.
Bristol, Blue Star ‘breakup’ has Ivywild hallways abuzz
Bristol Brewing Co. and Blue Star restaurant marked the beginning of a beautiful business partnership almost 30 years ago, inside neighboring operations, in co-owned property near the intersection of South Tejon Street and East Ramona Avenue. When the historic former Ivywild elementary building went on the market just blocks away at 1604 S. Cascade Ave., […]
Ed Sheeran Makes Huge Change to 'Loop Tour' Amid Macklemore Controversy
Ed Sheeran's Loop Tour looked very different from what fans may have expected when the singer-songwriter took to the stage in Philadelphia.
Ed Sheeran weeps on stage, says Israel's actions in Gaza 'unjustifiable' in emotional first speech since Macklemore fiasco
Clemson rallies to beat North Carolina 28-20 after weather delay
Clemson trailed 17-15 with 8:11 left in the game when officials sent both teams to the locker room after lightning was detected.
Pro-Palestinian protesters target Ed Sheeran’s Philadelphia concert after Macklemore removed from tour
Pro-Palestinian protesters waved flags and chanted outside Ed Sheeran's Philadelphia concert, one week after Macklemore was dropped from the tour.
Ed Sheeran's Tour Ticket Prices Drop, More Seats Available Amid Controversy
Shortly after Macklemore was dropped from Ed Sheeran's Loop Tour concert for his unapologetic support of Palestine, ticket prices for the singer's upcoming Philadelphia show have dropped by at least 50 percent.
Rep. Pfluger's Mystic Alerts Act Advances Through Senate Committee on Commerce, Science, & Transportation
FOR IMMEDIATE RELEASE: 9/16/2026CONTACT: Madelon Clark Rep. Pfluger's Mystic Alerts Act Advances Through Senate Committee on Commerce, Science, & TransportationWASHINGTON, D.C. — Today, Congressman August Pfluger's (TX-11) bipartisan and bicameral
Ed Sheeran's PA Concert Undergoes Major Change Amid Macklemore Controversy
Ed Sheeran's Saturday, September 19, Loop Tour concert in Philadelphia will feature a major change as the singer continues to face backlash.
Nearly 3 in 4 Americans are battling the same exhausting health problem, CDC reveals
More than seven in 10 U.S. adults experienced fatigue during a three-month period, according to a 2024 CDC survey of roughly 27,000 people. T
Nearly 3 in 4 Americans are battling the same exhausting health problem, CDC reveals
More than seven in 10 U.S. adults experienced fatigue during a three-month period, according to a 2024 CDC survey of roughly 27,000 people. T
Nearly 3 in 4 Americans are battling the same exhausting health problem, CDC reveals
More than seven in 10 U.S. adults experienced fatigue during a three-month period, according to a 2024 CDC survey of roughly 27,000 people. T
Nearly 3 in 4 Americans are battling the same exhausting health problem, CDC reveals
More than seven in 10 U.S. adults experienced fatigue during a three-month period, according to a 2024 CDC survey of roughly 27,000 people. T
Analysis: O'Neil can be encouraged at team's display
Ipswich scored last-minute goals in their wins over Sunderland and Crystal Palace and their fans would have had hopes of more late drama when seven minutes were added on at Hill Dickinson Stadium. Town had sent on Zian Flemming, who scored their winner against Palace, but the 10 men could not score, with Flemming wasting a good chance in injury time when he fired over the top. Centre-half Issa Diop almost snatched a point right at the end, only for his effort to be charged down by a combination of Branthwaite and Garner.
Everyone's finally caught up to Liverpool's biggest problem: Except Liverpool
Liverpool have a massive problem on their hands and people are finally noticing. Except Liverpool, however.Liverpool spent an awful lot of money in the summer once again. Only this time, they didn't s...
Analysis: Fearless Seagulls rewarded for attacking approach
Brighton came into this match as the league's top scorers and did not disappoint with their attacking mindset. Diego Gomez on the wing did an excellent job of keeping Riccardo Calafiori quiet, while Charalampos Kostoulas caused problems for the Gunners backline throughout. The 19-year-old Greece international deserved his excellent goal, which was his third in successive games, as he looks to show he can step up to be Brighton's main striker following Danny Welbeck's summer departure to Chelsea.
The Big Holes in Wearable Heart Rate Variability And Readiness Scores
On September 9th, Apple announced it was revamping its Apple Watch Health Sensing System, rolling out a Readiness score (0 to 10), and increasing the frequency of heart rate variability (HRV) outputs 24-fold. This can be viewed as upping its competition with various other consumer wearable sensors. These “readiness scores” as a composite of multiple metrics, with heart rate variability (HRV) being front and center for most. The majority of Americans are now using wearable sensors, which equates to well over 100 million adults. HRV and Readiness scores are increasingly being marketed as a measurement of autonomic nervous system health, a digital marker for future disease, a clock for biological age, and a holistic metric to promote healthspan and even longevity. (Apple also introduced a new longevity tab and “Health Age”.) None of this has been proven. In this edition of Ground Truths I am going to review what we know about heart rate variability and readiness scores. Heart Rate Variability HRV is the variation in normal heart cycle timing. The variability of the heart rate, the barely perceptible millisecond changes in time between consecutive heart beats (see R-R intervals in the Figure below, left panel), is due to interplay between the sympathetic and parasympathetic (vagal nerve) inputs. Distinct from heart rate, individuals with the same heart rate can have very different HRVs. It is a rough reflection of the autonomic nervous system (ANS) activity, inadequate to say whether a person’s ANS function is abnormal. For more than three decades, heart rate variability (HRV) has been measured and several studies have found an association of low HRV and clinical outcomes, particularly a link with higher all-cause and cardiovascular mortality. There have also been less well established links of low HRV to risk of early cognitive impairment, dementia, mental illness, Type 2 diabetes and substance abuse. An important reminder is that HRV is a surrogate marker without any established cause-and-effect relationship. If you increase your HRV, that doesn’t mean it will improve health outcomes. In fact, there is no hard evidence for that. All that work linking to health outcomes was done with electrocardiogram (ECG) derived HRV. Now, in the era of consumer wearables, this is getting assessed differently, by optical pulse (yes, the lights you see) plethysmography (PPG) or what is called pulse rate variability (PRV). They are not the same, as shown below (right panel) and only concordant when the delay between the ECG and pulse is kept constant, which basically means at rest. I should mention there’s also what I will call MPV, a mattress mechanical movement sensor, a derived heart rate variability, that companies like Eight Sleep use, even further away from directly measuring HRV. HRV has not one uniform measurement but many different types of quantification, such as RMSSD, the magnitude of difference between successive R-R intervals of normal sinus beats (N-N) or SDNN, the standard deviation of NN intervals, both in milliseconds. SDNN is one of the so-called frequency domain HRVs (others are LF, HF, LF/HF). Different wearable sensors use different metics; Apple has relied on SDNN and nearly all of the others use RMSSD, which is generally considered the more accurate metric. There’s also the different length of time measured, such as for a matter of minutes, all day, or an overnight’s sleep. Short measurements are especially problematic since they don’t capture enough of respiratory modulation and other factors that influence HRV. Share Ground Truths How well does HRV correlate with PRV? There are very limited studies, especially independently done. One that is commonly cited was conducted by Air Force researchers in only 13 healthy adults assessing Oura ring 3 and 4, Whoop 4.0, and Garmin Fenix 6 and showed a correlation coefficient of 0.88 to 0.97 and a mean absolute percentage error from 6 to 10%. The correlation is not a perfect 1.0, but there’s at least a fairly high level of correlation. HRV is supposed to increase during the night due to takeover of the parasympathetic nervous system, and higher during deep sleep. A recent example of my 1 week, all day “HRV,” and one during sleep is shown below. As you can see, the N of 1 data are inconsistent for the same days from different sensors (Oura, AppleWatch, Fitbit Air, and Eight Sleep) by patterns, absolute numbers, and comparison with prior days and weeks. The largest study in over 8 million Fitbit users (the old version, not Google Fitbit Air, introduced in May 2026) gives you a sense of the effect of age, sex, and the 2 different main HRV (here PRV) metrics, with RMSSD on the left and SDRR (=SDNN) on the right below. That study, from data collected in 2018, is a major outlier, since all the more recent ones are tiny with respect to sample size. Many of the companies have not had independent evaluation of their HRV, such as Eight Sleep, but have published a low standard error on their website. There are some other published studies on the correlation between HRV and PRV, but they are all small and only in healthy adults. A scoping review emphasized the lack of study in underrepresented individuals, including the aged, people of color (which affects the PPG signal), and individuals who are underweight or obese. Add the typical adult age 60 plus with one or more chronic diseases. For example, one study in over 900 adults found poor correlation of HRV and PRV, non-uniformly underestimated across many chronic diseases (cardiovascular, endocrine, neurological, respiratory, and others), concluding PRV is “an invalid surrogate for HRV.” A recent systematic review of 43 studies comparing HRV and PRV found reasonable pooled absolute standardized error (HRV as gold standard) but only 10 of the studies provided quantitative synthesis in ideal conditions. Their main conclusion was similarly cautious: “PPG-derived HRV [PRV] should not be regarded as universally interchangeable with ECG-derived HRV across all devices, populations, and recording contexts.” Factors Affecting HRV and PRV That gets me to the long list of factors that affect HRV (and PRV) besides the device, the type of measurement (RMSSD, SDNN or others), the person’s signal, the sensor site, the duration of data capture, if weighting by sleep stage is used, how artifact is processed and corrected. And this list is not complete!: Oura puts out data from their community of users (who input data) on what affects their overnight HRV. The factors currently provided are: no alcohol (increase 8%), melatonin (increase 2%, float tank (increase 2%), wine (decrease 4%), and party (decrease 14%) in overnight HRV. Must be some big parties! Subscribe What is a PRV measurement good for? It has been falsely characterized as an index of “autonomic balance” and a specific indicator of stress. A 2018 review of the studies available for HRV and its relationship to stress, not using any of the current wearables, found that stress can lower HRV. But so can many other factors. The non-specificity of the signal, indexed to the table above, is striking. Evidence from a UK Biobank study of over 46,000 participants with actual HRV looked at genetically predicted HRV, a genetic risk score, that failed to show the expected HRV-mortality link, indicating that _HRV is likely not causa_l, but rather a reflection of person’s physiologic state. A review of consumer wearable HRV data from 5 longitudinal studies showed that nighttime PRV was not associated with perceived stress, and surprisingly higher HRV, in the largest cohort (N=717 participants), was correlated with higher stress. An Oura ring cohort of 525 first-year college students found a link between overnight PRV and perceived stress, but that was also seen with resting heart rate, sleep, and respiratory rate. Several very small studies have examined the relationship of HRV and athletic injuries or guiding training with mixed, and predominantly negative results. HRV biofeedback training with paced breathing had no significant effect on reducing stress or raising HRV, as demonstrated with sham controlled trials. When HRV for multiple days showed a decline in conjunction with body temperature, the Oura ring published data for prediction of Covid. The WHOOP company sponsored an observational study, published in 2026, of 30,000 users for 72 weeks, without a control group, that reported reduced alcohol intake (5.8 % points) by self-report. That doesn’t tell us much, and particularly about the merits of HRV for behavioral change. If you use the same device and conditions as longitudinal trends for multiple (at least 2-3) weeks that may be the one way to get something useful from the measurements. Data for overnight sleep with minimal motion and using RMSSD is the best proxy for real HRV. The reason to look at trends rather than any given night is that it more likely represents something, even though you won’t know with certainty what the “it” is. Keep in mind there are no data, no peer-reviewed evidence, to show that HRV fluctuation in-person has any correlation with health outcomes. Share Readiness Scores These are proprietary scores that integrate different metrics for each of the wearables: no algorithms have been disclosed. They are unvalidated against health outcomes. In a review of 14 composite health scores of readiness and recovery, HRV contributed 86% to the scores, followed by reading heart rate (79%), physical activity and sleep duration (both at 71%). That review noted the substantial variability in measurement protools and lack of standardization. Sleep staging is notoriously inconsistent and inaccurate by these sensors, which adds further to the HRV uncertainties for what the scores, which use sleep stage data, mean. Only resting heart rate has been shown consistently across devices to be extremely accurate. I’ve made a Table to summarize what we know about which metrics are included, the scores, any peer-reviewed studies that compared the readiness score with health outcomes, and the corresponding (if any, NA-not available) citation. You will note that some companies do not use the term “readiness," such as WHOOP for recovery, and Garmin, which has 2 different scores, one of which is Body Battery. Eight Sleep uses the term “Fitness Score.” They all include HRV; Apple includes a new metric they call “Recovery HRV” which among other components uses 7-days of sleep, but it is unclear what this means or how it is differentiated from other scores (there are clearly no data for outcomes). We have no knowledge of how the different components are weighted or whether any of these scores are better than resting heart rate, HRV alone, physical activity, or any other single metric. Since none of these are standardized, they are not interchangeable, so if you get a 90 for Oura that has no relationship to a 90 on a Google Fitbit Air. Notably, the company can update its algorithm for readiness score at any point without notification to device users. Without any useful evidence of actionability for these scores or established relationship with health outcomes, it is hard to make a case for their value. At the Apple recent announcement they showed their Readiness score (0-10) on the watch (Figure below) but there are no published data on this score, not even on their website. It’s available only on their new Watch Series 12 or Ultra 4 [of course, ;-)]. That exemplifies the problems with these scores, lack of data and evidence for being meaningful to promote health. Perhaps the best study (which isn’t saying much) is the WHOOP Recovery for golfer performance, because it did correlate with an objective outcome, even though there was no control group and the authors were all from the company. Among the 389 pro golfers, an absolute 10-per cent point increase in Recovery score was associated with about 0.5 fewer strokes per round. But that’s hardly a health outcome! WHOOP is also conducting a study in over 2,700 runners to see if their recovery score will be linked to less injuries and improved performance, but that is not yet published and has no control group or randomization. Putting This in Context For two decades I’ve been enthusiastic about the potential for digital health and particularly wearable biosensors. Over the years, we’ve seen some great progress for their ability to promote physical activity and accurately detect atrial fibrillation (the first FDA cleared deep learning AI for consumers). That work was the subject of rigorous research. But there are holes in the data and evidence for other metrics. One notable one is the “VO2 max” story that I wrote about earlier this year. At that time many subscribers asked me to cover heart rate variability, which I finally got to here. When I dived into the research and publication for HRV and readiness scores, I expected to find at least some that were of high quality and demonstrated their utility by linkage to health outcomes. To my surprise, I found none. The wearable sensor measurements for HRV (PRV) are, for the most part, accurate, but that validation work has only been done in small studies of healthy adults and does not take into account the long list of factors, from the device, software side, and the user side, that affect HRV measurements. Moreover, this metric chiefly relies on optical sensing and, as we have learned for heart rate PPG sensing, may be less accurate in people of color. Keep in mind that all of the health outcome association evidence comes from ECG-derived HRV; none are from wearable sensor data. I will repeat the key point: there's no peer-reviewed evidence to show that in-person HRV fluctuation—or efforts to raise your HRV— has any correlation with health outcomes. For those of you who look at your HRV on awakening, or even 2+ week trends of it being low, I hope this context helps to relieve any anxiety. Yes, low HRV (not PRV) has been shown to increase risk of some diseases as summarized above. But efforts to raise your HRV—a surrogate metric— has not been established for improving any health outcomes. HRV does not have any evidence of causality (the genetic evidence actually goes against this possibility). In this summary, I have not included data for other wearable sensors such as Polar, Samsung, Withings, Suunto, Amazfit, Coros, Ultrahuman, or additional mattress sensors. These are beyond my first-hand experience, and as far as I know from my in-depth review none have any peer-reviewed published data that differ from the 6 sensors I’ve reviewed here. From the points I’ve gone over above, we’re not ready for readiness scores. Besides being proprietary, they are predominantly based on metrics that have their own issues. It’s compounding the problem, like building a house without a solid foundation that has never undergone a rigorous inspection, and then selling it. Like I mentioned for PRV, you can look at trends over weeks rather than any single day, to get a handle, but even that may not be helpful. There’s simply no evidence that these scores meaningfully relate to health outcomes. I’d emphasize they might, but that requires doing prospective or randomized studies to prove it. None exist. There’s great promise for HRV/PRV utility_. For example**,**_ Prof Maiken Nedergaard, who discovered the brain glymphatics that are essential in eliminating metabolic waste products from the brain during sleep, has posited that HRV could be a non-invasive marker for neuromodulator oscillations, brain-body regulatory circuits, and brain clearance. That would be extremely useful, but like everything else on HRV and readiness scores it requires solid research and validation. The lay media isn’t helping much to get the story straight. Earlier this year The Economist published a piece entitled “The most useful indicator of your overall health” which ordained HRV as an “accumulated stress score.” That’s akin to the false assertion about VO2max: “V02 max is the singular most powerful marker for longevity.” As I’ve summarized here, that is not established. The fact is that so many things can lower HRV, including physical exercise (especially an intense workout), reduced sleep quality, stress, the list above, no less the device, signal, and software. Whatever fluctuations observed have not been correlated with any health outcome. Sadly, “datamaxxers” are widely using HRV and readiness scores that have never been validated to mean anything. We already know that for some people using the sensors for sleep metrics, it can induce “orthosomnia,” an obsession to get high sleep quality, with associated high levels of anxiety. In an experiment done by a company to promote sleep quality for its employees, “For those employees who did use the trackers, many reported feeling perfectly rested until their tracker told them they had had a terrible night. Others were told that they had slept like a baby when they had actually been lying awake worrying about the quality of their sleep. “ The same problem can result from preoccupation with HRV or readiness scores, with anxiety that would lead to further reduction in both. It you are using a wearable like >100 million American adults, it’s OK to look at these data, but contextualized with the major caveats reviewed here. If you are one to require evidence that HRV or readiness scores are linked to health outcomes, you may not even want to look. The companies make it hard to turn them off! Let me end with the companies that make and sell wearables. Apple’s doubling down on HRV (24-fold more reporting and heart rate very 5 seconds) and introduction of a Readiness score tells us that consumers have bought into these metrics and they are joining the club. However, all of this is occurring with a backdrop of tens millions of users, claims about the data that are not backed up by adequate evidence, marketing way out in front of whatever limited data exists, and not being transparent about their readiness score algorithms. The companies can well afford to do the research that is needed to connect these metrics with health outcomes show, once and for all, that increasing HRV or using readiness scores promotes our health. If they believed and invested in the products they are selling, we’d not be in this position of not knowing. That’s essentially where we are with HRV and readiness scores. Perhaps someday this will change and we’ll have good reason to embrace them. NB: I wrote this post. No AI. I have no conflicts of interest with any of its content. Loading... Ground Truths has 215,000 subscribers from every US state and 214 countries. There are over 300,000 followers of Ground Truths so more than 90,000 folks who can easily convert to be free subscribers. Your subscription to these free essays and podcasts makes my work in putting them together worthwhile. If you’re not a subscriber, please join! If you found this interesting PLEASE share it! Share Ground Truths The proceeds from all voluntary paid subscriptions go to support our summer internship program. It enabled us to accept and support a record number of 62 summer interns that joined us in 2026! These are high school, college and medical students selected from thousands of applicants. We couldn’t do this expanded program without the funds coming in through Ground Truths. Thank you!
How to watch UNC’s road matchup against Clemson
Here’s how you can catch one of the more interesting matchups of UNC’s 2026 season.
For Palestinian aid groups, Macklemore’s $1M pledge brings relief and attention to ongoing suffering
Macklemore's $1 million donation pledge is coming at a critical time for Palestinian relief nonprofits.
For Palestinian aid groups, Macklemore's $1M pledge brings relief and attention to ongoing suffering
Macklemore's $1 million donation pledge is coming at a critical time for Palestinian relief nonprofits | WWL
An 'impossible' black hole merger may finally be solved thanks to Einstein's relativity — but it raises an even bigger mystery
New research suggests that a perplexing signal created by a pair of colliding black holes may have been warped by a space-time phenomenon known as gravitational lensing. This theory could finally explain the "impossible" size of the merging singularities, but it also poses a new problem.
$700 Billion Data Center Boom: Tax Gains Beat Political Backlash
Data centers need fewer city services than warehouses; electricity and water are solvable problems; and tax gains keep outweighing political backlash