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Diesel prices in Bakersfield top $8 a gallon, squeezing trucking firms and raising grocery costs
Bakersfield diesel prices are up 60% from last year, topping $8 a gallon and straining local trucking and farm businesses.
Dealroom.co | Terra Behavioral Health makes first acquisition, buying California's Latitude Recovery
What's the deal? Temecula, California-based Terra Behavioral Hea…
A big deal for Generac, a new public market, and more Milwaukee business news
Milwaukee Business journal editor-in-chief Tim Gibbons talks with WTMJ's Adam Roberts about a big deal for Generac, a new public market in Brookfield, and
Arsenal performance not fit for champions
Bruno Guimaraes said Arsenal's "unacceptable" performance in their defeat at Brighton & Hove Albion was not fit for a Premier League champions' shirt. Arsenal's 100% start to the new season ended in abrupt fashion as Brighton put Mikel Arteta's side to the sword with a brilliant 3-0 victory.
Felix Anudike-Uzomah discusses building on Week 1 performance
During his press conference, Kansas City Chiefs defensive lineman Felix Anudike-Uzomah discussed building on his Week 1 performance | @EdEastonJr
'The First Wives Club' Turns 30, Its First Milestone Since Diane Keaton's Death
"It was the best of times," Bette Midler has previously said of filming the movie.
'The First Wives Club' Turns 30, Its First Milestone Since Diane Keaton's Death
"It was the best of times," Bette Midler has previously said of filming the movie.
'The First Wives Club' Turns 30, Its First Milestone Since Diane Keaton's Death
"It was the best of times," Bette Midler has previously said of filming the movie.
Downtown Bethlehem sports bar, restaurant up for sale
Located at 515 Main St., the restaurant and bar is listed for $799,000 and features a full menu, sports viewing and established clientele.
How This Founder Turned Her Side Hustle Into a $500,000 Business
Former Survivor cast member Liz Wilcox was working as a copy editor when she had the idea to start selling email templates.
EXCLUSIVE: Justin Trudeau's Katy Perry Romance 'Worries Political Pals'
Justin Trudeau's romance with Katy Perry reportedly sparks concern among his political pals.
Phillies Trade Deadline Addition Ends Season After Just 4 Games
The Philadelphia Phillies have officially lost a player acquired in a four-player trade for the season after a very short stint.
‘Who wants to sign up to deal with the political pressure?’: Smithsonian faces Trump’s culture war as search for leader is on
By René Marsh, CNN (CNN) — As the Smithsonian Institution prepares to launch a nationwide search for a new leader, an unexpected question mark hangs over the position that’s long been considered a plum one in the worlds of art, science and history. “Who wants to sign up to deal with the political pressure?” one
‘Who wants to sign up to deal with the political pressure?’: Smithsonian faces Trump’s culture war as search for leader is on
As the Smithsonian Institution prepares to launch a nationwide search for a new leader, an unexpected question mark hangs over the position that’s long been considered a plum one in the worlds of art, science and history.
Exeter pay tribute to former coach and keeper Miller
Exeter City manager Matt Taylor says he admires the way his side played in the aftermath of the death of Kevin Miller.
"I've heard good updates on his progress and the …
"I've heard good updates on his progress and the …
Dealroom.co | Great Hill Partners: middle-market growth buyouts across software, financial services, healthcare, consumer and business services
What's the deal?Great Hill Partners is a Boston- and London-base…
FSU students show interest in staying in Tallahassee
Nearly 900 FSU students attended a local career fair, challenging the idea that graduates always leave the city.
Editorial: Suspend South Carolina’s gas tax? With these roads?
A growing chorus of elected officials and political candidates are calling for a suspension of the gas tax. Why that is a supremely bad idea.
Did the Vikings really shoot fiery arrows at funeral boats?
The idea of Vikings using fire arrows to set funeral boats ablaze is seen frequently in popular culture. But did it really happen?
2nd NYC health system makes deal
A second major New York City health system has struck a deal with the Trump administration to no longer provide gender-transition care to adolescents and pay a penalty to the federal government, the Justice Department announced on Friday.
The surprising John Beaton statistics
Surprising Beaton stats, but who’s in charge shouldn’t be an excuse, Celtic need to win, it’s all about how we adapt ourselves…14th January 2026; Falkirk Stadium, Falkirk, Scotland; Scottish P...
Dear Abby: I need my friends to stop complaining about their health issues
Dear Abby advises a person who wants their elderly friends to stop complaining about their health issues.
Standout Stats | Juventus Women-Roma | Serie A Women's Cup Final
The Women's First Team picked up their first silverware of the season as they beat Roma on penalties in the 2026/27 Serie A Women's Cup final.The match ended 2-2 after 90 minutes, with Isaac Guerrero'...
Angels 6, Twins 5: Mostly Dead
The Twins made their remaining loyal contingent suffer through a blown lead and another loss in extra frames, as the Angels took the third game of the series. Walker Jenkins continued his tear, leading off the third inning with a single. This would enable Luke Keaschall to bring him home on a one-out double; Keaschall […]
3 Key Matchups for Ravens-Saints Week 2
The Ravens look to keep their season perfect in their home opener. How do they do it while dealing with injuries?
Detroit Pistons: How Ausar Thompson’s Deal Compares Across NBA
The Detroit Pistons signed Ausar Thompson to a five-year, $155 million rookie scale extension on Friday
Dealroom.co | Veritas Capital acquires Coronis Health RCM platform
What's the deal? In July 2022, Veritas Capital acquired Coronis…
Searle’s new deal
LEICESTER Tigers and England A fly-half Billy Searle has signed a new contract with the club. The 30-year-old joined Leicester in 2025 from French club Agen and scored 217 points in 24 appearances in all competitions during his debut season. His form earned him a nomination for the Prem player of the season award in […] The post Searle’s new deal appeared first on The Rugby Paper .
Don’t rule Ford out of England
■By BEN JAYCOCK ANTHONY Watson believes England fans would be “ridiculously foolish” to write George Ford out of the battle for the No.10 jersey at next year’s World Cup. Ford was included among the 25 players handed enhanced EPS contracts by Steve Borthwick and Watson is far from surprised to see the 105-cap fly-half remain […] The post Don’t rule Ford out of England – Watson appeared first on The Rugby Paper .
DR Congo rolls out Ebola vaccine for health workers as death toll rises
50,000 frontline staff to receive a jab for a different Ebola strain, with 20,000 enrolled in a one-year clinical trial.
DR Congo rolls out Ebola vaccine for health workers as death toll rises
50,000 frontline staff to receive a jab for a different Ebola strain, with 20,000 enrolled in a one-year clinical trial.
Possible measles exposure reported at Philadelphia International Airport not related to CHOP case
Toronto Blue Jays Playoff Chances Dealt Blow Early on Saturday
The Blue Jays lost 0.5 games in the standings before even taking the field on Saturday.
Spain star drops out of squad for Nations League fixtures
Luis de la Fuente and the Spanish national team coaching staff have on Saturday been dealt a setback on the personnel front. This comes amid confirmation of Pedro Porro dropping out of La Roja’s lat...
Michigan’s two major party candidates for U.S. Senate offer differing ideas for health care
Republican Mike Rogers rolls out plan heavy on transparency; Democrat Abdul El-Sayed advocates for Medicare for All
The Worst Seed The Cubs Can Get In The Postseason
A three-way deadlock atop the Wild Card standings forces Chicago into a high-stakes sprint. With postseason odds secured, the North Siders must now battle for crucial seeding.
New York Giants Dealt Yet Another Scary Injury Blow
The New York Giants are banged up heading into Week 2.
Kenneth Walker III responds to disciplinary actions from the NFL
Kansas City Chiefs running back Kenneth Walker III responded to disciplinary actions from the NFL | @EdEastonJr
Red Wings Linked to Patrik Laine as Season Approaches
Pierre LeBrun floated Patrik Laine as a possible Detroit Red Wings fit. Here is how the unsigned scorer could help and what could prevent a deal.
Barcelona star limps off with injury vs Sevilla
La Liga champions Barcelona have on Saturday been dealt a potential setback on the personnel front. This comes after Andreas Christensen was forced into an early departure from the club’s latest out...
Deals: iPhone 18 Pros launch, refurbished iPhone 17 Pros are expensive, Galaxy Z8 foldables discounted
A refurbished 17 Pro Max costs as much as when it was new. The iPhone 18 Pro and 18 Pro Max went on sale this week in the US, along with 64 other countries...
Puka Nacua questionable for Week 2
Rams WR Puka Nacua will be listed as questionable for MNF after two days of no practice with hip injury
Sandro Wagner confirmed as new Hannover 96 coach
Hannover 96 have confirmed the appointment of Sandro Wagner as their new head coach.The former Germany assistant and Augsburg head coach has signed a two-year deal with the 2. Bundesliga club.“Follo...
Iman Explains Why She Didn’t Feel She Could ‘Pay Attention to My Own Grief’ After David Bowie’s 2016 Death (Exclusive)
“My grief came later,” the supermodel and activist said while speaking exclusively to PEOPLE
Michael Pittman Jr. ruled out for Week 2
Michael Pittman Jr. downgraded to out following two missed practices with foot injury
Florida health department confirms dengue as Tampa woman's cause of death
The 80-year-old was apparently the first person in the region killed by the mosquito-spread virus in nearly a century. There are signs the Hillsborough County outbreak could be waning.
Eustace claims Derby deserved to beat Burnley
Derby County manager John Eustace speaks to BBC Radio Derby after Mo Fuseini scored a stoppage-time equaliser in their 1-1 draw with Burnley at Turf Moor
No 'magic bullet' for malaria—elimination will require a combination of tools, say global health expert
As malaria cases and deaths rise worldwide and resistance threatens current treatments and prevention tools, eliminating malaria will require a combination of strategies rather than relying on a single ...
Analysis: Moyes' Toffees moving in right direction
Manager David Moyes will be delighted at the start his Everton side have made to the campaign. The Toffees won none of their final seven games as they finished 13th last season and missed out on the European qualification that at one stage had been within their grasp. Everton also suffered a tough end to the transfer window, with key attacking midfielder Iliman Ndiaye going to Manchester City in a £65m deal and striker Beto, their top scorer last season, leaving for Fiorentina for £14.6m.
Will unlikely starts continue in second week of NFL season?
Four NFL games feature 0-1 teams facing 1-0 opponents. History shows how rare and unpredictable these 2-0 starts are.
Collector says $130K in vintage collectibles stolen from Corona storage unit
A vintage collectibles dealer says approximately $130,000 worth of merchandise was stolen from a storage unit in Corona, dealing a major setback to his business.
Trump announces all 50 states joining Medicaid drug pricing model
The Trump administration claims that Medicaid will save billions on prescription drug costs as a result of the plan, dubbed the Medicaid “GENEROUS” model. Experts say the savings are unclear since the content of the deals isn't public.
Warhammer 40k: Auspex Scanning the New Space Marine Models
The drop pod assault has begun, and we have a close-up look at the new Angels of Death. Codex: Space Marines is up for pre-order alongside some much-needed reinforcements for Space Marine players everywhere. Games Workshop sent us a selection of these new kits, and we wasted no time in getting them built! Captain on […]
Health officials confirm first dengue fever death in Hillsborough County
The Florida Department of Health confirmed the first dengue fever-related death in Hillsborough County.
Tropical disease spread by mosquitoes claims first recorded death in southern US state
Gay Small died on her 80th birthday from dengue after a mosquito bite near her Tampa home, the Florida Department of Health confirmed Friday.
Exclusive | Get on the bus: New mobile medical clinic aims to keep NYC cops healthy and prevent sudden deaths
Dear Annie: My daughter tried to convince me to change my political beliefs. Now we're not speaking
During the last election, she tried to convince me to vote for her party.
PA Health Department prepares to withdraw request for CDC aid amid rise measles cases
Pennsylvania Secretary of Health calls on the CDC to publicly recognize four measles-associated deaths
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!
Dave Toub discusses a recently elevated practice squad player
During his press conference, Kansas City Chiefs coordinator Dave Toub discussed recently elevated practice squad player Ben VanSumeren | @EdEastonJr
Denmark hails 'binding' Greenland deal with Trump
The terms of the deal are uncertain, and Denmark says its sovereignty remains intact
The escalating standoff between the CDC and Pennsylvania over measles deaths
Pennsylvania has reported fourth deaths associated with measles, but the CDC has not included them in its national total — a conflict rarely seen in public health.
World’s largest economy joins Saudi Arabia, Turkey and Israel in battle for Red Sea influence as it lifts sanctions on Eritrea despite its role in Ethiopia war that killed 600,000
The United States has lifted sanctions on Eritrea imposed over its role in the deadly war in neighbouring Ethiopia, as Washington seeks to “advance US regional interests” in a country strategically positioned along the Red Sea
Opinion | Panic Won’t Fix the Looming A.I. Threat. Politics Will.
The threats from A.I. are real — and they’re ones we know how to deal with.
Flagstaff Festival of Science 2026: Message from the president
Just as the Festival of Science does today, Route 66 connected places, people and ideas. The Mother Road provided a new opportunity to explore and inspired countless people as they
Phillies Move Toward Deal With Braves Superstar Ronald Acuna’s Brother
The Philadelphia Phillies are reportedly nearing a contract agreement with a historic talent in an Atlanta Braves family member
Secret contracts reveal undisclosed terms in Trump’s drug-pricing deals
Agreements with Pfizer and Eli Lilly include tariff protections, overseas pricing inducements and broad confidentiality clauses.
Best Hulu deals and bundles: Best streaming deals in September 2026
Stream excellent shows and movies at a heavily discounted price.
Why New Orleans businesses are keeping it old-school as AI flyers explode in popularity
Despite the large presence of AI promotion, all across NOLA you can still find the real deal taped to telephone poles, pinned to cork boards and posted on social media.
Commanders' Terry McLaurin reacts to lack of Week 1 targets
Washington Commanders top receiver Terry McLaurin says there are "other ways you can affect the game" after having only two receptions in the opener.
Juventus v Atalanta match preview and prediction
Juventus take on Atalanta in their next league game, days after enjoying a superb 5 0 win against NEC in the Europa League. The upcoming fixture is expected to provide a much tougher test for the Bian...
Meta (META)’s Stilla.ai Deal Could Turn Business Agent Into a New Monetization Engine
Meta Platforms, Inc. (NASDAQ:META) is taking another step toward monetizing artificial intelligence beyond its core advertising business. On September 9, the company acquired AI startup Stilla.ai. The acquisition will strengthen the company’s agentic AI capabilities as it moves to capitalize on growing demand for AI agents that can handle business transactions. Plans are underway to […]
AS Roma vs Inter Milan – Predicted lineup and team news
AS Roma and Inter Milan, the two leading teams in the current Serie A standings, will meet in a major top-of-the-table contest at the Stadio Olimpico in Rome on Saturday. The match will be the final f...
Kylian Mbappe Drops Nike for On Sponsorship Deal
Kylian Mbappe ended a 20-year Nike partnership Friday to join Roger Federer-backed On, taking equity in the brand as it launches football boots in 2027.
Frustration grows as Houthis widen Middle East conflict with US unwilling to intervene
Dramatic recent advances by the Iran-backed Houthis, including the seizure of a strategically important island in the Red Sea, have dealt another blow to a region reeling from the US war with Iran and exacerbated an already severe global energy crisis. But neither the US nor its key ally Saudi Arabia has a clear plan to beat back the group, multiple sources told CNN, leading many in the region to ask where the counteroffensive will come from.
Vegas Five-Day Sale to offer up to 60% off on resort stays
Las Vegas resorts are offering up to 60% off stays for booking during a five-day sale from Sept. 22 to 26; the sale also includes deals on dining and entertainment.
Onvida Health reports 43% drop in sepsis deaths after launching new alert system
Providers at Onvida Health in Yuma say a new hospital-wide alert system is significantly improving patient outcomes.
Arab business owner says sewage backups along North Main Street are a recurring problem
A sewage backup along North Main Street in Arab has been cleaned up, but a local business owner says it is not the first time she has dealt with the city’s sewer system overflowing.
Ligon breaks Chillicothe's single-game touchdown record in win
In a double-digit win over Wilmington, Chillicothe junior Cartae Ligon broke the program's single-game touchdown record with eight scores.
'Lollipop Chainsaw': Feature Film Of Cult Japanese Video Game Coming
'Lollipop Chainsaw', the cult Japanese video game, is becoming a feature film, just announced at the Tokyo Game Show.
Bilodeau’s Bakery Returns for Palmetto Sports Daily’s Locks of the Week
WATCH: Palmetto Sports Daily crew predicts their “Locks of the Week” for college football games including a cupcake selection and splitting on LSU-Ole Miss.
Politics Unusual: NYS Comptroller nominee Hernandez, NYC Deputy Mayor for Housing and Planning
In this episode of Politics Unusual, FOX 5 NY's political reporter Morgan McKay sits down with Joseph Hernandez, the Republican candidate for the NYS Comptroller race, to discuss how he would handle his responsibilities if elected. Also, a conversation with New York City Deputy Mayor for Housing and Planning Leila Bozorg about policy ideas regarding affordable housing.
The Minnesota Orchestra welcomes five new full-time musicians
The Minnesota Orchestra introduces five new full-time musicians to its ranks this fall. Sumin Kim will take up a position as assistant principal viola, while Nicholas Gallitano and Joshua Kail
Broncos make decision on Courtland Sutton's option bonus, impacting 2027
The Broncos did not utilize the option bonus mechanism in Courtland Sutton's contract, and it would be easy to exit the deal in 2027.
Health Brief: White House touts Medicaid drug deals
Plus: Three pressure points for global health.
Pelle Larsson's deal will start at $13.5 million in …
Pelle Larsson's deal will start at $13.5 million in …
Campobasso puts neighbors before politics
Dear Editor, In today’s world, it seems easier than ever to divide ourselves by politics, opinions and differences. What I appreciate most about John Campobasso is that he refuses to see people through...
Trump claims 'infinite' Greenland security deal with Denmark
US President Donald Trump said Friday that he had struck a deal with Denmark to give Washington "permanent control" over Greenland's security that would bar Russia and China from setting...
Trump says US reached Greenland security deal
President Donald Trump said Friday that the United States has reached an agreement with Denmark and Greenland that gives the United States “permanent control” over Greenland’s security and bars any US adversary from having a military presence on the island.
U.S. and Denmark Reach Security Deal on Greenland, Trump Says
The full contours of the deal were unclear, but Denmark and Greenland both indicated they expected an agreement to be signed soon.
Broncos Face A New But Familiar Challenge This Week
The Denver Broncos will need to rediscover their pass rush if they're going to beat Trevor Lawrence and the Jags.
Trump announces ‘forever’ deal to defend Greenland as Denmark says signing ‘expected’ next week
President Trump announced an agreement with Denmark that he said gives the United States "permanent" sway over Greenland's security.
Curtis Pride: I felt the cheers and found belonging in baseball
Deaf Awareness Month has a deep, personal meaning to me.
Trump says he has a deal to bolster U.S. military presence in Greenland
The announcement comes after months of threatening to take island by force from the NATO ally
Trump says he has a deal to bolster U.S. military presence in Greenland
The announcement comes after months of threatening to take island by force from the NATO ally