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FAA grounds flights at major Northeast airports after fiber line cut
An Amtrak construction crew accidentally cut a fiber-optic line, disrupting flights at Newark Liberty, JFK, LaGuardia and other Northeast airports.
FAA grounds planes at major airports for hours
The FAA grounded flights at Newark Liberty International Airport, JFK Airport and LaGuardia after Philadelphia TRACON lost its primary circuit.
Germany’s political center suffers historic blow, Turkey weighs coming to Saudi Arabia’s aid, Major TV networks support outlets banned from White House
Two weeks ago, German Chancellor Friedrich Merz was “shocked” when his conservative CDU party got creamed by the hard right AfD in local elections in the state of Saxony-Anhalt. That was just the start.
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
Hayden Panettiere memorialized in Malibu celebration of life
Friends, family and close Hollywood colleagues honored Hayden Panettiere during a poignant celebration of life at a Malibu church this weekend, a month after the actress’s death from a possible
Mystique’s Lesbian Relationship Reportedly Cut From Middle East Release of ‘Wolverine’
Screenshots and video circulating on social media show that some versions of the game awkwardly cut out any reference to the shapeshifter’s queerness.
Population Science Fall Seminar Series kicks off
The Population Research Institute and the Collaborative on Population Aging Disparities will host the Population Science Seminar Series this fall, featuring hour-long talks from scholars whose research examines population dynamics and the social forces that shape them. Seminars will take place on select Tuesdays from noon to 1 p.m. in the Susan Welch Liberal Arts Building, room 314.
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.
Kamala Harris launches into the 2026 midterms as her 2028 decision looms
Kamala Harris is diving into the midterms, campaigning with Democrats like Senate nominee Abdul El-Sayed in Michigan | NewsRadio 1080 KRLD
How red went from the color of revolution to the color of Republicans in US politics
For American conservatives of the Cold War era, red was the color of communists and the mistrusted American left. Now, it’s the color of the GOP, while Democrats are blue. How did this happen?
Inside Late Hayden Panettiere's Intimate Malibu Celebration of Life
New details have emerged from the private Malibu ceremony honoring the life and legacy of Hayden Panettiere.
Louisa Proske’s Met debut will be ‘Macbeth,’ ‘a terrifying tale for terrifying times’
Louisa Proske is making her Met debut directing Verdi’s “Macbeth.” | WWL
Louisa Proske’s Met debut will be ‘Macbeth,’ ‘a terrifying tale for terrifying times’
Louisa Proske is making her Met debut directing Verdi’s “Macbeth.” | WBEN
Ebola vaccine trial begins in DR Congo
An Ebola vaccine trial is underway in the Democratic Republic of the Congo (DRC), involving frontline health workers and others involved in the response.
Business Notes: Airports awarded millions in grants; renovated library reopens
View which organizations are landing grants and which businesses are celebrating milestones.
Can 'A Different World' sequel change lives like the original series? Hillman is back in session
Netflix’s new “A Different World” sequel arrives with high expectations | KCBS All News 106.9FM and 740AM
KCC Entertainment Design | Mega City shortlisted for award
The large-format social entertainment venue, delivered for developer Wellstone, is one of three KCC-designed projects on the shortlist
Rebel Wilson appears in Sydney court over 'The Deb' producers' sabotage allegations
Australian actor Rebel Wilson has returned to a court in Sydney over her directorial debut, “The Deb,” with producers accusing her of sabotaging the 2024 musical comedy | WWL
Rock 'n' roll Saints defensively fallible
BBC reporter Tom Gayle looks back on Southampton's loss to Wrexham and why their all out attack leaves them vulnerable.
Liberian official’s Minnesota group home accused of overbilling Medicaid
A new state investigation found Golden Touch Health Care billed Medicaid for 45 hours of services per day — a number that was mathematically impossible on many days based on its staffing levels.
Chimpanzees once used for vaccine research get health checks as part of long-term care
Chimpanzees once used in hepatitis B vaccine experiments are getting health checks at their new home in Liberia. The West African chimpanzees receive care such as teeth cleanings and X-rays
Presley Gerber, son of Cindy Crawford, dies at 27, family representative says
Presley Gerber, the son of supermodel Cindy Crawford, has died at age 27 | NewsRadio 1080 KRLD
Presley Gerber, son of Cindy Crawford, dies at 27, family representative says
Presley Gerber, the son of supermodel Cindy Crawford, has died at age 27 | KNX News 1070 AM
Presley Gerber, son of Cindy Crawford, dies at 27, family representative says
Presley Gerber, the son of supermodel Cindy Crawford, has died at age 27 | WBBM Newsradio 780 AM & 105.9 FM
Trump decries Democrats as 'communists,' even as he looks to impress China's communist leader
President Donald Trump says that communism is the greatest threat the U.S. has ever faced | 100.1 FM and AM 1020 KDKA
Tiny wild cat newly identified as a species draws curious visitors in Bolivia
A tiny wild cat newly identified as a species in Bolivia has become an unlikely tourist attraction | WBBM Newsradio 780 AM & 105.9 FM
Tiny wild cat newly identified as a species draws curious visitors in Bolivia
A tiny wild cat newly identified as a species in Bolivia has become an unlikely tourist attraction | WWJ Newsradio 950
Tiny wild cat newly identified as a species draws curious visitors in Bolivia
A tiny wild cat newly identified as a species in Bolivia has become an unlikely tourist attraction | 104.1 FM KMOX
Iowans, business owner react to Sunday's flooding in Marion, Cedar Rapids
KGAN CBS 2 and KFXA Fox 28 provide local news, weather forecasts, notices of events and items of interest in the community, sports and entertainment programming for Cedar Rapids and nearby towns and communities in the Corridor and throughout eastern Iowa, including Iowa City, Waterloo, Dubuque, North Liberty, Coralville, Marion, Morengo, Williamsburg, Washington, Tiffin, Tipton, Solon, Mount Vernon, Lisbon, Central City, Urbana, Independence, Manchester, Dyersville, Oelwein, Cedar Falls, Waverly, Evansdale, Guttenberg, West Union, New Hampton, Decorah, Waukon, Maquoketa, Sigourney, Fairfield, Grundy Center, La Porte City, Dysart, Fayette, Elkader, Strawberry Point and Belle Plaine.
Making the most of scientific research
Only a fraction of research findings make it into the public realm — a huge loss of scientific knowledge that could be used more widely, says a U of A researcher who is leading an effort to create an open data-sharing platform to help further exploration and discoveries in spinal cord injury research.
Not Apple, Not Bose: Owners Say These Are The Best Earbuds For Phone Calls
Anker's Soundcore Liberty 5 Pro and Huawei's FreeBuds Pro 5 have garnered praise for clear sound, powered in part by bone conduction sensors.
Trump and Mamdani plan to meet in New York during the president's upcoming UN visit
President Donald Trump plans to meet with New York City Mayor Zohran Mamdani when Trump travels to the city for the upcoming U.N. General Assembly | WWJ Newsradio 950
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:
'La Bola Negra' wins TIFF's People Choice Award, putting it on Oscar path
“La Bola Negra,” the Spanish queer epic about the intertwined lives of three gay men, won the People’s Choice Award at the Toronto International Film Festival on Sunday, confirming its status as a major Oscar contender | Talk 1370
Box Office: 'Resident Evil' tops box office with franchise best debut of $60 million
Zach Cregger’s “Resident Evil” is giving the North American box office a boost in its first weekend | WBBM Newsradio 780 AM & 105.9 FM
Bayer 04 Mourns The Loss Of Peter Hermann
The quintessential assistant, Hermann masterminded German football’s greatest triumphs from the shadows, leaving an indelible mark on Leverkusen and Bayern Munich during a legendary forty-year coaching career.
Deion Sanders wasn't happy that some players were laughing after blowout loss
Saturday night's blowout loss to Northwestern had some Colorado players not behaving like they were in a "fucking library."
Bouncy balls with Mad Science
Libbi Farrow and Adaleigh Rowe make bouncy balls with Mad Science.
Trump says his planned arch would become a 'military complex' able to host drones and snipers
President Donald Trump says the massive arch he wants to build between the Lincoln Memorial and Arlington National Cemetery would become a “top grade military complex” able to host drones and snipers while storing ammunition | TALK 980am
Trump says his planned arch would become a 'military complex' able to host drones and snipers
President Donald Trump says the massive arch he wants to build between the Lincoln Memorial and Arlington National Cemetery would become a “top grade military complex” able to host drones and snipers while storing ammunition | Newsradio 1140 WRVA
Trump says his planned arch would become a 'military complex' able to host drones and snipers
President Donald Trump says the massive arch he wants to build between the Lincoln Memorial and Arlington National Cemetery would become a “top grade military complex” able to host drones and snipers while storing ammunition | WWL
Alaskans will decide fate of ranked choice voting system after chaotic end to state's primary
Alaska’s primary revealed some of the headaches related to a major change in how voters select their candidates | NewsRadio WILK
Alaskans will decide fate of ranked choice voting system after chaotic end to state's primary
Alaska’s primary revealed some of the headaches related to a major change in how voters select their candidates | NewsRadio 1080 KRLD
Nathan Cofnas's revolution: Science, heredity, and the values of liberal society
The Jason Arday scandal broke after Cofnas ran Arday’s doctoral thesis through plagiarism detection software.
Lib Democrats fight for a breakthrough in Britain’s fractured politics
Britain’s Liberal Democratic Party is holding its annual conference in Brighton this weekend.
One Foot Down Reacts: We Like The Lines
With under nine hours to tonight’s kick, let’s take a quick peek at our weekly survey question at One Foot Down. If Notre Dame is going to be a championship caliber team, it’ll be on the backs of guys like linebacker Jaiden Ausberry, defensive end Bryce Young, safety Adon Shuler and linebacker Drayk Bowen. This […]
How to watch Memphis’ home game against UT Martin
Memphis returns to action at Simmons Bank Liberty Stadium for its final non-conference game against UT-Martin. The Tigers will look to bounce back following a 38-20 loss against Boise State.
Lib Dems will be a firewall against Nigel Farage, Davey says
Lib Dem leader Ed Davey claimed the party was aiming to beat its 2024 record of 72 MPs in any snap election.
Seattle’s progressive values need businesses to succeed
As the Seattle mayor and council begin deliberations on the city budget, they should remember that a strong economy supports city services.
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!
5 must-see things at George Lucas's new Museum of Narrative Art as it opens to the public
The new Lucas Museum of Narrative Art opens to the public on Tuesday in Los Angeles | WBBM Newsradio 780 AM & 105.9 FM
5 must-see things at George Lucas's new Museum of Narrative Art as it opens to the public
The new Lucas Museum of Narrative Art opens to the public on Tuesday in Los Angeles | 830 WCCO
MS NOW says its journalists were denied access to the White House grounds
MS NOW says its journalists were denied access to the White House grounds Saturday morning | WWJ Newsradio 950
MS NOW says its journalists were denied access to the White House grounds
MS NOW says its journalists were denied access to the White House grounds Saturday morning | WBBM Newsradio 780 AM & 105.9 FM
MS NOW says its journalists were denied access to the White House grounds
MS NOW says its journalists were denied access to the White House grounds Saturday morning | KYW Newsradio
MS NOW says its journalists were denied access to the White House grounds
MS NOW says its journalists were denied access to the White House grounds Saturday morning | KNSS Radio
MS NOW says its journalists were denied access to the White House grounds
MS NOW says its journalists were denied access to the White House grounds Saturday morning | KMBZ
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
Munich’s Oktoberfest roars to life as the mayor taps the first keg
Munich's Oktoberfest has kicked off with the city's mayor tapping the first beer keg, marking the start of the 191st edition of the festival | KNX News 1070 AM
Munich’s Oktoberfest roars to life as the mayor taps the first keg
Munich's Oktoberfest has kicked off with the city's mayor tapping the first beer keg, marking the start of the 191st edition of the festival | NewsRadio 1080 KRLD
Munich’s Oktoberfest roars to life as the mayor taps the first keg
Munich's Oktoberfest has kicked off with the city's mayor tapping the first beer keg, marking the start of the 191st edition of the festival | WBBM Newsradio 780 AM & 105.9 FM
Sidelines Scoreboard: High School Football Highlights (9/18/26)
(KSEE/KGPE) – Game of the Week: Clovis 41, Bullard 14 Clovis West 49, Turlock 8 Clovis East 34, Frontier 20 Kingsburg 54, Selma 0 Bakersfield 49, Tulare Union 27 Madera 56, Merced 33 Liberty (Madera) 41, Summerville 20 Orosi 42, Fowler 6 Immanuel 29, Edison 8 Porterville 45, Dinuba 42 Chowchilla 62, Fresno 8 Sunnyside […]
Pacers' Latest News Gives More Reason for Tyrese Haliburton Excitement
Indiana Pacers fans have been given another reason to get excited about Tyrese Haliburton.
Ed Sheeran is set to return to stage for 1st time since Macklemore was cut and other acts withdrew
Ed Sheeran is set to resume his tour Saturday, perhaps alone, after all his supporting acts withdrew | KNX News 1070 AM
Ed Sheeran is set to return to stage for 1st time since Macklemore was cut and other acts withdrew
Ed Sheeran is set to resume his tour Saturday, perhaps alone, after all his supporting acts withdrew | Talk 1370
Ban on selling handguns to young adults under 21 is unconstitutional, Justice Department says
The Justice Department says federal law banning licensed firearms dealers from selling handguns to young adults under age 21 is unconstitutional and can’t be enforced | KNX News 1070 AM
Ban on selling handguns to young adults under 21 is unconstitutional, Justice Department says
The Justice Department says federal law banning licensed firearms dealers from selling handguns to young adults under age 21 is unconstitutional and can’t be enforced | Newsradio 1140 WRVA
President Donald Trump Bans CNN, MS NOW, and Politico From White House
The move marks a major escalation of the White House’s conflict with the reporters who cover it.
I listened to every ACL Fest 2026 act
Every year when the Austin City Limits Music Festival lineup comes out, a new group of people joins the "I can't believe I'm this old and out of touch" crew. Trust us, we don't recognize half of the acts either.
From Proselytism to Politics: Bishop Barron Addresses Hot-Button Issues on EWTN
The Word on Fire founder clarifies the call to evangelize, defends his nonpartisan advisory role on religious liberty, and warns of resurgent communism.
Trump says he is banning CNN, MSNOW and Politico from the White House
President Donald Trump says he is banning CNN, MSNOW and Politico from the White House due to what he called unfavorable coverage, and threatens that more such prohibitions of media outlets could follow | KCBS All News 106.9FM and 740AM
Trump says he is banning CNN, MSNOW and Politico from the White House
President Donald Trump says he is banning CNN, MSNOW and Politico from the White House due to what he called unfavorable coverage, and threatens that more such prohibitions of media outlets could follow | KNX News 1070 AM
Trump says he is banning CNN, MSNOW and Politico from the White House
President Donald Trump says he is banning CNN, MSNOW and Politico from the White House due to what he called unfavorable coverage, and threatens that more such prohibitions of media outlets could follow | News-Talk 1380 WAOK
Bilingual Storytime, Anime, and Science Sundays
See upcoming dates/times for adventures in reading at Hillsboro Libraries...
Political Pulse: Tamara Lesnar runs as third-party alternative in Secretary of State race
Libertarian candidate Tamara Lesnar is running for South Dakota Secretary of State, proposing a mock-ballot portal to track public opinion on pending state and federal legislation.
In 'If I Go Will They Miss Me,' a family seeks healing under the LAX flight path
Writer-director Walter Thompson-Hernández's feature film "If I Go Will They Miss Me" explores connection and healing under the LAX flight path | Talk 1370
In 'If I Go Will They Miss Me,' a family seeks healing under the LAX flight path
Writer-director Walter Thompson-Hernández's feature film "If I Go Will They Miss Me" explores connection and healing under the LAX flight path | WWL
Kings Land Two NBA Champions in 2017 Redraft
The Sacramento Kings are hoping Darius Acuff Jr. is the lead guard of the future, after dealing former draft picks Tyrese Haliburton and De'Aaron Fox. See who was swapped out for Fox at the No. 5 pick of the 2017 draft below.
Judge isn't swayed by government's claims that plans for an 'anti-weaponization fund' are dead
A federal judge who blocked the creation of a $1.8 billion “anti-weaponization fund” for compensating President Donald Trump’s political allies isn't swayed by a government attorney’s assurances that the concept is abandoned | News-Talk 1380 WAOK
Faropoint adds another Long Island property to its portfolio
Faropoint purchased a 33,500-square-foot industrial building in Farmingdale for $6.35 million, expanding its Long Island portfolio.
Harvard Business School Rock Center for Entrepreneurship announces 2026–2027 Entrepreneurs-in-Residence
The 2026-2027 EIRs, Venture Builders, VCAs, and LSs further strengthen one of the most comprehensive entrepreneurship expert networks in higher education.
GTA V's Canceled Liberty City Expansion Revealed In Massive New Leak
An older 190GB leak from 2022 seems to have finally been dumped online for everyone to dig into
Duncan Sheik, Tony- and Grammy-winning 'Spring Awakening' composer and pop star, dies at 56
Tony- and Grammy-winning musician Duncan Sheik has died at 56 | WWL
Touro Law launches mandatory AI training for incoming students
Touro Law Center in Central Islip mandates AI training for new students to ensure ethical and competent use of technology in legal practice.
Another new TOD project takes shape in Hicksville
Developers and construction crews mark topping off of $58 million Fieldstone at North Broadway, a transit-oriented mixed-use project in Hicksville.
Duncan Sheik, Tony Award-winning composer, dies at 56
Duncan Sheik attends 'The Broadway Legacy Foundation Launch' at the Broadway Museum on November 11, 2025 in New York City. (Santiago Felipe/Getty Images)Duncan Sheik, the Tony Award-winning composer behind Spring Awakening and more, has died, according to his Instagram. He was 56.The Friday morning Instagram post said the "father, husband, son, brother, and friend" died on Thursday night "surrounded by love."A message shared on Sheik's Instagram earlier this week by his family said he was "receiving medical care" and was "in critical but stable condition.""The world has a lost a singular talent, and deeply influential voice in music and theater," Friday's statement said. "From his Grammy-nominated hit “Barely Breathing” to his groundbreaking, Tony and Grammy Award-winning work on Spring Awakening, Duncan’s artistry touched many and leaves an indelible mark on the cultural landscape."Born on Nov. 18, 1969, in Montclair, New Jersey, Sheik rose to fame in 1996 when he released his self-titled debut album, which included his hit song, "Barely Breathing."The song peaked at No. 16 on the Billboard Hot 100 chart and earned him a Grammy nomination for best male pop vocal performance.Following his debut album, he released Humming in 1998, Phantom Moon in 2001 and Daylight in 2002.While "Barely Breathing" established Sheik as a singer-songwriter, his career later expanded into musical theater, where he found success as a composer.Sheik collaborated with lyricist Steven Sater and composed the music for Spring Awakening, which opened on Broadway in 2006.He told Broadcast Music, Inc. in 2015 that around the time he was making the music for Spring Awakening, he wasn't "a huge fan" of music that was happening on Broadway and he wanted to make the music for an audience "beyond the normal crowd that would go to a Broadway musical."The rock musical, based on Frank Wedekind's 1891 play and starring Jonathan Groff, Lea Michele, John Gallagher and Skylar Astin, became a major success. It won eight Tony Awards in 2007, including best musical, best original score and best orchestrations.He went on to compose music for several other stage productions, including American Psycho and Because of Winn-Dixie. He also collaborated with Sater again on Alice by Heart and The Secret Life of Bees.In his interview with Broadcast Music, Inc., he added that working on musical theater has "helped broaden my palette."Sheik went on to release several more albums throughout his career, including White Limousine, Whisper House, Covers 80s, Legerdemain and Claptrap.In May, it was announced that Sheik's new musical, Memoirs of Amorous Gentlemen, would make its off-Broadway debut this fall. The musical is based on Moyoco Anno's manga graphic novel of the same name.An off-Broadway revival of Spring Awakening is also set to open this fall. Copyright © 2026, ABC Audio. All rights reserved.
Black moms and pregnant women forced out of their homes in metro Detroit face health and safety threats
Detroit had 20,370 eviction cases filed in 2025. But evictions that do not go through the formal court process are not included in the city’s official eviction data.
Back in black: Princess Diana's 'revenge dress' goes on show ahead of Sotheby's auction
A striking black dress worn by Princess Diana on the day her estranged husband admitted adultery is going up for auction at Sotheby’s | WBBM Newsradio 780 AM & 105.9 FM
Back in black: Princess Diana's 'revenge dress' goes on show ahead of Sotheby's auction
A striking black dress worn by Princess Diana on the day her estranged husband admitted adultery is going up for auction at Sotheby’s | KMBZ
Attorney General Blanche's appearances at political events blur Justice Department boundaries
Attorney General Todd Blanche is blurring traditional boundaries between politics and federal law enforcement with speeches at political events that depart from longstanding norms meant to protect the Justice Department from the appearance of partisan bias | WWL
Attorney General Blanche's appearances at political events blur Justice Department boundaries
Attorney General Todd Blanche is blurring traditional boundaries between politics and federal law enforcement with speeches at political events that depart from longstanding norms meant to protect the Justice Department from the appearance of partisan bias | K-DAWN
A truck driver built a model of NYC with over 800,000 structures for fun. Now it's a museum exhibit
A truck driver who spent two decades building a massive scale model of his native New York City was delighted when it went viral on TikTok | WBBM Newsradio 780 AM & 105.9 FM
A truck driver built a model of NYC with over 800,000 structures for fun. Now it's a museum exhibit
A truck driver who spent two decades building a massive scale model of his native New York City was delighted when it went viral on TikTok | KCBS All News 106.9FM and 740AM
A truck driver built a model of NYC with over 800,000 structures for fun. Now it's a museum exhibit
A truck driver who spent two decades building a massive scale model of his native New York City was delighted when it went viral on TikTok | NewsRadio 1080 KRLD
Allen leads way as Bills opened stadium with a convincing win over Lions
| WGR Sports Radio Buffalo