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Sentencing date still to be determined amid health issues for Gov. Newsom's ex-chief of staff
Dana Williamson, a former top political aide to key Democratic leaders in California, including Gov. Newsom, is still struggling with an unexpected health issue and a hearing to discuss her prison sentencing has been postponed.
Arkansas Advocate on Ozarks at Large: School grades, health campus, AI rules
Arkansas Advocate Editor-in-Chief Andrew DeMillo joined Ozarks at Large Senior Producer Matthew Moore on KUAF to discuss the latest grades for Arkansas schools, Alice Walton's healthcare campus plans and potential AI guardrails in Arkansas.
Future Leader: Chase Knight, Chief Growth Officer, Empassion Health
Chase Knight, Chief Growth Officer at Empassion Health, has been named to the Future Leaders Awards Class of 2026 by Hospice News. To become a Future
Speck hired as chief marketing officer at Hyper Energy Bar
Hyper Energy Bar has named Rebecca Speck chief marketing officer as the drive-thru beverage company expands across the Midwest. Speck will lead the company’s brand and marketing strategy. She most recently served as vice president of strategy and insights at Scooter’s Coffee, where her work included brand growth, menu and product strategy and customer insights.…
Health Watch: Lumin Health
Dr. Benjamin Yudkoff, MD, MA (Co-Founder & Chief Medical Officer, Lumin Health) joined Fox 5 DC.
Dolly Parton’s estate accuses nephew of threatening to destroy her legacy
The country icon’s estate is seeking a restraining order against Bryan Seaver, who was also Parton's former security chief
Jared Kaplan's AI safety concerns last year gain traction at Anthropic
Jared Kaplan, Anthropic's chief science officer, is a crucial figure in AI development. He also foresaw the doom debate hinging on AI training itself.
MUSC Health-Pee Dee Division names new CEO
MUSC Health-Pee Dee Division has named its new chief executive officer.
Britain's JD Sports says Nike turnaround is only a matter of time
Nike is taking the right steps to revive its business and a turnaround is only a matter of time, said the finance chief of British sports and fashion retailer JD Sports , one of the U.S. group's largest customers.
Britain's JD Sports says Nike turnaround is only a matter of time
Nike is taking the right steps to revive its business and a turnaround is only a matter of time, said the finance chief of British sports and fashion retailer JD Sports , one of the U.S. group's largest customers.
PLA chiefs’ downfall eliminated ‘political danger’, military mouthpiece says
Ousting of Zhang Youxia and Liu Zhenli was a ‘major victory’ in the Chinese military’s war on corruption: PLA Daily.
Health Partners Group Appoints Ruth Handcock as Chief Executive Officer
LONDON, September 23, 2026--Health Partners Group, the UK’s leading provider of high-quality occupational health and treatment services, today announced that Ruth Handcock will join as Chief Executive Officer, effective from 2nd November 2026. Andrew Noble, Co-Founder, who has served as CEO for the past ten years, will become Co-Chairman, working closely with Ruth, the senior leadership team and the Board.
Hospitals are conveners, not dividers
In this climate, it has become too easy to point fingers without offering meaningful solutions to the country’s healthcare affordability crisis. To make matters worse, there is a tendency to turn our back on complex problems that don’t have easy answers in favor of oversimplified rhetoric that ignores reality. As chief executive of a rural […]
Chief Counsel told staff early not to use Signal
The influencer issue this summer left the group chat.
Portland Police chief accused of violating state law by criticizing city councilor’s past tweets
Did Portland Police Chief Bob Day break the law when he criticized a city councilor last week? That’s a question several Portlanders are asking state officials to answer.
Patrick Mahomes' Remarkable Overtime Record Gets Even Better
Patrick Mahomes improved an already remarkable overtime record in the Kansas City Chiefs' Week 2 victory over the Indianapolis Colts.
Montana Health Department Director Stepping Down for Private-Sector Job
The director of Montana’s largest state agency, the Department of Public Health and Human Services (DPHHS), is stepping down from his position at the end of October for a job in the private sector. Charlie Brereton, 31, has led DPHHS since 2022, after serving as the agency’s chief of staff and as Gov. Greg Gianforte’s […]
Sanford leader joins Newsweek AI Health Summit
Chief Transformation Officer Tommy Ibrahim will share Sanford's AI strategy during a panel discussion with national healthcare leaders.
Chief Announce Kenneth Walker III News After Overtime Colts Win
The Kansas City Chiefs shared news about an accomplishment for running back Kenneth Walker III. The post Chief Announce Kenneth Walker III News After Overtime Colts Win appeared first on HEAVY.
‘Halo’ to move under Call of Duty publisher as Xbox announces layoffs
The cuts affect Halo Studios, other first-party developers, and management and central functions within Xbox, according to an announcement posted this morning by Matt Booty, Xbox’s chief content officer. The company is now about 75 percent finished with a restructuring announced earlier this year.
Serenity Mental Health Centers Co-Founders Ben and Tricia Pease Named 2026 Salt Lake City Titan 100 Honorees
SALT LAKE CITY, September 22, 2026--Serenity Mental Health Centers co-founders and chief executives Ben and Tricia Pease have been named 2026 Salt Lake City Titan 100 honorees.
Optimi Health Appoints Dr. Michael Blough as Chief Clinical Development Officer
Supports Optimi’s planned Phase 2 psilocybin trial in major depressive disorder and Phase 3 MDMA trial in PTSDVANCOUVER, British Columbia, Sept. 22, 2026 (GLOBE NEWSWIRE) -- Optimi Health Corp. (NASDAQ: OPTH) (CSE: OPTI) (FSE: 8BN) ("Optimi" or the "Company"), a commercial-stage pharmaceutical manufacturer of regulated psychedelic drug products, today announced the appointment of Michael Blough, Ph.D., as Chief Clinical Development Officer. Dr. Blough has significant experience leading Health Ca
DoorDash Chief Business Officer Keith Yandell Sells 2,184 Shares
Yandell disposed of stock worth $438,460 under a pre-established trading plan, while maintaining a direct holding of 120,688 shares valued.
La Liga chief dismisses Real's ref conspiracy claims
La Liga president Javier Tebas says claiming there is a refereeing conspiracy against Real Madrid is like "living in another galaxy".
Toy Association Op-Ed Published in Real Clear Politics Makes the Case for Tariff-Free Toys
The Toy Association™ is continuing to amplify the toy industry’s call for preferential tariff treatment of toys, with a new op-ed by Kathrin Belliveau, chief legal & policy officer at The Toy Association, published online today i
Wave Life Sciences Appoints Monika Vnuk as Chief Business Officer
Wave Life Sciences appoints Monika Vnuk, MD, as Chief Business Officer to lead business and corporate development efforts.Quiver AI SummaryWave Life Sciences Ltd. announced the appointment of Dr. Monika Vnuk as Chief Business Officer, bringing extensive experience from her previous roles at Sanofi, Blackstone, and Pfizer. In her new role, Dr. Vnuk will oversee business and corporate development, as well as alliance management, aimed at advancing
Furlani officially departs Milan with new look directors in place
Giorgio Furlani is no longer part of Milan’s board, nearly four months after the club announced his dismissal as chief executive.According to TuttoMercatoWeb, the latest company registry filing conf...
Chiefs News: Chiefs look like old selves with new help
The latest Chiefs news, brought fresh to you every morning!
Brad Keselowski Parting Ways With NASCAR Cup Series Crew Chief
Brad Keselowski and RFK Racing are parting ways with crew chief Jeremy Bullins, effective immediately. Bullins was Keselowski’s crew chief from the beginning of the 2025 NASCAR Cup Series season and was previously atop the driver’s pit box at Team Penske. Mike Skarbowski, an RFK Racing engineer, will serve as Keselowski’s interim crew chief. No announcement […] The post Brad Keselowski Parting Ways With NASCAR Cup Series Crew Chief appeared first on HEAVY.
Alibaba plans AI model with 5 trillion to 10 trillion parameters, unveils new chip
Alibaba Group plans to train a new artificial intelligence model with between 5 trillion and 10 trillion parameters, Chief Executive Eddie Wu said on Tuesday, as the Chinese technology giant outlined a sweeping strategy encompassing AI models, chips and data centres.
Fastly Inc. (FSLY) Jumps 15% Ahead of Tuesday’s Key Business Updates; Hedge Fund Conviction Weak
Fastly Inc. (NASDAQ:FSLY) climbed by 14.92 percent on Monday to end at $27.42 apiece as investors began positioning portfolios ahead of key business updates at its Investor Day meeting tomorrow, September 22. The rally was supported by earlier warnings from Anthropic Chief Executive Officer Dario Amodei that development of artificial intelligence must slow down and […]
Hiscox USA names a new finance chief from Liberty Mutual
The hire comes as Hiscox USA continues expanding its specialty insurance platform
Andy Reid reveals injury updates on Josh Simmons, Mansoor Delane
During his press conference, Kansas City Chiefs head coach Andy Reid revealed injury updates on Josh Simmons and Mansoor Delane | @EdEastonJr
Hussein Syed, RWJ Barnabas Health, Chief Information Security Officer, Again Honored as A CISO To Know Nationwide
Hussein Syed, Chief Information Security Officer (CISO) for RWJBarnabas Health, was honored by Becker’s Hospital Review as one of just 55 Hospital and Health System CISOs and Chief Privacy Officers to Know, recognized for his work defending the organization against cyberattacks, a critical function for every hospital and health system. Mr. Syed has been included on Becker’s list several times.
How Epic turns America's health data into answers
Software developer Caleb Cox and chief medical officer Dr. Jackie Gerhart discussed how Cosmos, Epic Research’s database, spurred tools like health alerts.
As The Deadline Nears, Civil Society Urges Spain To Nominate María Neira As WHO Chief
With Thursday’s 24 September deadline looming, international scientific societies and civil society leaders are pushing Spain to sponsor a last-minute WHO Director-General nomination for Dr María Neira. Endorsed by Nobel Peace Prize Laureate Adolfo Pérez Esquivel and Dr Carlos Ferreyra of Climate, Life and Health International, the petition urges Spanish ministers to register her candidacy before entries close.
Colts' Week 2 Snap Counts: Adjustments Made, With Unexceptional Results
Check out the snap counts from the Indianapolis Colts' Week 2 loss to the Kansas City Chiefs to see how much (or how little) everyone played.
Alpine Boosts F1 Midfield Fight With Crucial Hiring
In an effort to climb up from the midfield, Alpine is bringing in a former Mercedes technical chief.
Memorial Healthcare System Names Shane Strum President & CEO
Board of Commissioners confirms permanent leadership following a two-year interim tenure marked by record growth and expanded access to care HOLLYWOOD, Fla., September 3, 2026 — The South Broward Hospital District Board of Commissioners has voted to name Shane Strum President and Chief Executive Officer of Memorial Healthcare System, confirming a role he has held on […]
Patrick Mahomes Dominates Colts' Defense In 33-30 Overtime Win
After a back-and-forth shootout with the Indianapolis Colts, the Kansas City Chiefs get a huge win to improve to 2-0 as Patrick Mahomes dominates. The Colts have not won a game since Week 9 of last season, and the first loss of their 2025 collapse was against the Chiefs. That game was also the Chiefs' […] The post Patrick Mahomes Dominates Colts’ Defense In 33-30 Overtime Win appeared first on Stadium Rant.
Patrick Mahomes discusses the offense's improvement after two games
During his press conference, Kansas City Chiefs quarterback Patrick Mahomes discussed the offense's improvement after two games | @EdEastonJr
The rumors of the demise of Scheel’s Sports Park are greatly exaggerated, says tourism chief
Visits are ramping up, and will continue to do so, Dahl said.
PPG appoints Alex Lopez vice president, investor relations, operational finance
PPG (NYSE: PPG) today announced that Alex Lopez, currently PPG director, investor relations, has been appointed PPG vice president, investor relations and operational finance, effective Oct. 1. Lopez will continue to report to Jamie Beggs, PPG senior vice president and chief financial officer. Alex Lopez has been appointed PPG vice president, investor relations and operational finance. In this expanded role, Lopez will continue to lead investor relations while assuming responsibility for enterprise operational finance, with a focus on strengthening capital discipline, productivity governance and operational finance effectiveness. Lopez has held a variety of finance roles of increasing responsibility during his 20 years with PPG, including business-specific finance leadership as well as corporate roles. Prior to assuming the investor relations role in 2024, Lopez served as global finance director, Automotive OEM Coatings. He also supported the growth of PPG Comex when he relocated to
NJ labor chief criticizes 'river of misinformation' about independent contractor rule
A rule set to take effect Oct. 1 has caused a furor among business groups and freelancers, but the state insists enforcement won't change.
Political Risk Reshapes M&A Strategy, White & Case Chief Says
EchoStar Corp.'s deals to sell airwave rights to AT&T and SpaceX highlight the political and regulatory pressures driving M&A activity, according to the lawyer who steered the transactions.
Heading to Queen City Mischief & Magic 2026? Here's the ultimate guide
Staunton hosts the Queen City Mischief & Magic' festival featuring new 'Wizard of Oz' attractions. Here's your guide, with schedule and highlights.
Bundesliga Team of the Week
With Matchday 4 of the 2026/27 Bundesliga season in the books, Bulinews Editor-in-Chief Rune Gjerulff has selected his Team of the Week.Goalkeeper:Finn Dahmen, AugsburgAugsburg conceded three goals ag...
Taylor Swift Celebrates Travis Kelce’s First Touchdown of the Season: ‘That’s My Husband!’
The Kansas City Chiefs triumphed over the Indianapolis Colts at Arrowhead Stadium
2 Shane Steichen Mistakes Cost Colts Signature Win Vs. Chiefs
The Indianapolis Colts had multiple ways to control their own destiny against the Kansas City Chiefs on Sunday Night Football in Week 2. Colts head coach Shane Steichen gave those chances away, though. And when all was said and done, the Colts lost 33-30 to the Chiefs on a Harrison Butker walk-off field goal. There […] The post 2 Shane Steichen Mistakes Cost Colts Signature Win Vs. Chiefs appeared first on HEAVY.
Accelerating AI creates need to nurture a constituency for ‘anticipatory democracy’
Recent appeals from a half-dozen chief executives in our artificial intelligence (AI) community asking the federal government to jump in and slow them down should alarm us all. Their warnings imply a fear their rapid progress in achieving “super intelligence” just may get us all killed. Now that Congress is considering mandatory “kill switches” installed […]
Patrick Mahomes leads Chiefs to dramatic overtime win against Colts
Patrick Mahomes leads Chiefs to dramatic overtime win against Colts - Kansas City Chiefs held their nerve to pick up a tense victory over the Indianapolis Colts on Sunday night
Spygate: Southampton and Tonda Eckert await FA ruling
As Southampton manager Tonda Eckert awaits the FA hearing into his 'Spygate' misconduct conduct charge BBC sports editor Dan Roan speaks to him and club chief executive Phil Parsons on what happens next.
Why Replay Overturned Colts' Fumble Call vs. Chiefs In Overtime
A replay review kept the Indianapolis Colts' overtime possession alive against the Kansas City Chiefs on Sunday night when it overturned the call that Laquon Treadwell had fumbled.
Colts’ WR Depth Chart Changes After Alec Pierce Injury
The Indianapolis Colts are going to have to dig deeper into their WR depth chart on Sunday. They lost Alec Pierce to a first-half injury, and they already were missing one wideout for Sunday Night Football against the Kansas City Chiefs. Pierce had one catch before exiting. He actually got hurt on a play in […] The post Colts’ WR Depth Chart Changes After Alec Pierce Injury appeared first on HEAVY.
Broncos Rally to Beat Jaguars in Wild Comeback
The Denver Broncos came roaring back Sunday afternoon, overcoming a 13-3 deficit to defeat the Jacksonville Jaguars 20-13 at Empower Field at Mile High. After a disappointing season-opening loss to the Kansas City Chiefs, Denver needed a response. It got exactly that, scoring 17 unanswered points in the second half to hand Jacksonville its first…
Chiefs grab 33-30 win in overtime thriller
KANSAS CITY, Mo. (KSNT) — Victory is secured in an overtime thriller. Patrick Mahomes finished the night 32-for-47 with 382 yards and three touchdowns. Kenneth Walker III picked up his second-straight game with over 100 yards for the Chiefs, with 117 yards on 24 carries. Travis Kelce had nine receptions for 101 yards and a […]
Alec Pierce Injury Update Isn’t Good News For Colts
The Indianapolis Colts need all their weapons to keep up with the Kansas City Chiefs on Sunday Night Football. They certainly need big-play WR Alec Pierce, who led the NFL in yards per catch a season ago. Pierce is coming off a four-catch, 61-yard Week 1, and he was back out there hoping to make […] The post Alec Pierce Injury Update Isn’t Good News For Colts appeared first on HEAVY.
Instant analysis of Colts' Week 2 overtime loss vs. Chiefs
Here are our instant takeaways from the Indianapolis Colts' Week 2 overtime loss to the Chiefs.
Colts Lose OT Thriller vs. Chiefs On Sunday Night Football
The Indianapolis Colts lost a thrilling overtime road matchup on Sunday Night Football against the Kansas City Chiefs, 33-30.
Why Brewers Pulled Jacob Misiorowski After Pitching 3 Innings
Jacob Misiorowski must’ve wanted to watch the Sunday Night Football matchup between the Kansas City Chiefs and Indianapolis Colts. Because after pitching three innings on Sunday Night Baseball for the Milwaukee Brewers, he was pulled from the game. For those not paying more attention, it certainly could cause alarm. The Brewers are just a week […] The post Why Brewers Pulled Jacob Misiorowski After Pitching 3 Innings appeared first on HEAVY.
Why Colts Losing Is Good For Jets
There’s one team that should spend the entire season rooting against the Indianapolis Colts. That would be the New York Jets. No matter who the Colts play — whether it’s the Baltimore Ravens in Week 1, or the Kansas City Chiefs in Week 2, or any team going forward. The Jets benefit from the Sauce […] The post Why Colts Losing Is Good For Jets appeared first on HEAVY.
Taylor Swift points to wedding ring, shouts, ‘That’s my husband!’ as Travis Kelce scores touchdown at Chiefs game
The newlywed music icon showed out for Kansas City’s big home game against the Indianapolis Colts at Arrowhead Stadium on Sunday.
Alec Pierce ruled out for remainder of SNF
Indianapolis Colts wide receiver Alec Pierce left the Week 2 game against the Kansas City Chiefs in the first half due to a left heel injury
Travis Kelce sets NFL record for yards after catch
Add another feat to an already decorated and lengthy resume for Kansas City Chiefs tight end Travis Kelce.
Israeli settler shot dead in West Bank before Yom Kippur
Israeli civilian shot dead in West Bank as tensions rise; Iran's foreign minister heads to UN via Qatar, and CIA chief visits Egypt.
Alec Pierce injury update as Colts WR exits against Chiefs
The Colts lost top wide receiver Alec Pierce to a heel injury against the Chiefs. Here are the latest updates.
Sunday Night Football live discussion: Colts at Chiefs
Live chat with BTB fans for the Sunday night game
Sunday Night Football Week 2: Chiefs-Colts live blog
The Kansas City Chiefs are set for another primetime battle as they look to go 2-0 against the Indianapolis Colts on Sunday Night Football.
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
Inside the White House media ban
Many senior staff were surprised by the directive, which happened while chief of staff Susie Wiles was out of town.
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
Oracle CEO tells employees AI has not sped up product delivery
Oracle's chief reveals what the AI productivity boom is missing.
Oracle CEO tells employees AI has not sped up product delivery
Oracle's chief reveals what the AI productivity boom is missing.
Oracle CEO tells employees AI has not sped up product delivery
Oracle's chief reveals what the AI productivity boom is missing.
NFL Sunday Night Football best bets Week 2
Sunday Night Football brings the Indianapolis Colts to Arrowhead to face the Kansas City Chiefs, and there are several player props worth targeting. Here are four bets for the Week 2 NFL matchup. MORE: Bold predictions for Week 2 of…
Sunday Night Football: How to watch the Indianapolis Colts vs. Kansas City Chiefs game tonight
How to watch this week's Sunday Night Football clash between the Colts and the Chiefs.
EU associate membership: The name is irrelevant, the politics aren’t
Each week, Euronews’ chief Europe editor Maria Tadeo debriefs the ins and outs of continental politics. This week, reporting from Strasbourg, she examines the EU’s pitch for associate membership for Canada.
This Ford exec's family Claude agent is on a PIP
Whitney Stefko Dover built a family chief of staff with Anthropic's Claude. The agent, named Claudette, has fresh competition for her job.
Trump asked budget chief to draft order bringing health research funding under his control
The move came after the NIH director refused Trump’s request to cut Harvard grants in an Oval Office meeting.
Baxter hopes football link will pay off
■By SAM JACKSON EXETER Chiefs have been sharing knowledge with Premier League side AFC Bournemouth in a bid to land the Prem trophy after last season’s final agony. The Chiefs were taken over by the US-based group Black Knight, which also owns the Cherries, at the end of June. So far, Exeter’s heads of strength […] The post Baxter hopes football link will pay off appeared first on The Rugby Paper .
Chile's Bachelet quits race to be next UN chief
Michelle Bachelet, the former president of Chile, withdrew her candidacy for the position of United Nations secretary-general on Saturday, weeks after a straw poll showed her in second to last
Xavier Worthy Explains Miscue With Patrick Mahomes vs. Broncos
Overall, the Kansas City Chiefs had a good showing on offense in Week 1 against the Denver Broncos. The rushing attack was the best we have seen from the Chiefs in several years, led by Kenneth Walker III. However, the passing game left a little to be desired. Quarterback Patrick Mahomes started the game completing […] The post Xavier Worthy Explains Miscue With Patrick Mahomes vs. Broncos appeared first on HEAVY.
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
Oscar Health (OSCR) Bets On Lucy As CEO Calls Time On Employer Coverage
Oscar Health (NYSE:OSCR) introduced its AI-driven Lucy Healthcare Marketplace, a digital hub for carriers, brokers, and consumers. The company presented Lucy as part of a shift toward individual coverage options, including support for ICHRA-based benefit designs. Chief executive Mario Schlosser said the traditional employer-sponsored health insurance structure is ending, pointing to alternative coverage models. Oscar Health’s Lucy Healthcare Marketplace launch and public push toward...
Can the Colts avoid the dreaded 0-2 start?
The Colts must find a way to win against the Chiefs.
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. 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