Science
‘A Tiny Bit of Math’ Might Improve Your Heart Health, Study Suggests
Many people use a smartwatch to monitor their cardiovascular health, often by counting the number of steps they take over the course of their day, or recording their average daily heart rate. Now, researchers are proposing an enhanced metric, which combines the two using basic math: Divide your average daily heart rate by your daily average number of steps.
The resulting ratio — the daily heart rate per step, or DHRPS — provides insight into how efficiently the heart is working, according to a study conducted by researchers at the Feinberg School of Medicine at Northwestern University and published today in the Journal of the American Heart Association.
The study found that people whose hearts work less efficiently, by this metric, were more prone to various diseases, including Type II diabetes, hypertension, heart failure, stroke, coronary atherosclerosis and myocardial infarction.
“It’s a measure of inefficiency,” said Zhanlin Chen, a third-year medical student at the Feinberg School of Medicine at Northwestern University and lead author of the new study; his coauthors included several Feinberg faculty physicians. “It looks at how badly your heart is doing,” he added. “You’re just going to have to do a tiny bit of math.”
Some experts said they saw wisdom in DHRPS as a metric. Dr. Peter Aziz, a pediatric cardiologist at the Cleveland Clinic, said it appeared to be an advance on the information provided by daily steps or average heart rate alone.
“What is probably more important for cardio fitness is what your heart does for the amount of work it has to do,” he said. “This is a reasonable way to measure that.”
The metric does not look at heart rate during exercise. But, Dr. Aziz said, it still provided an overall sense of efficiency that, importantly, was shown by researchers to have an association with disease.
The size of the study added validity to the findings, Dr. Aziz said. The scientists mapped Fitbit data from nearly 7,000 Smartwatch users against electronic medical records.
Mr. Chen said that a simple way to grasp the value of the new metric was to compare two hypothetical individuals. Both take 10,000 steps a day, but one has an average daily resting heart rate of 80 — in the middle of the healthy range — while the other’s daily resting heart rate is 120.
The first person would have a DHRPS of 0.008, the second 0.012. The higher the ratio, the stronger the signaling of cardiac risk.
In the study, the 6,947 participants were divided into three groups based on their ratios; those with the highest showed a stronger association with disease than other participants did. The D.H.R.P.S. metric was also better at revealing disease risk than were step counts or heart rates alone, the study found.
“We designed this metric to be low-cost and to use data we’re already collecting,” Mr. Chen said. “People who want to be in charge of their own health can do a little bit of math to figure this out.”
Science
Owners of mobile home park destroyed in the Palisades fire say they’re finally clearing the debris
Former residents of the Palisades Bowl Mobile Home Estates, a roughly 170-unit mobile home park completely destroyed in the Palisades fire, received a notice Dec. 23 from park owners saying debris removal would start as early as Jan. 2.
The Bowl is the largest of only a handful of properties in the Palisades still littered with debris nearly a year after the fire. It’s left the Bowl’s former residents, who described the park as a “slice of paradise,” stuck in limbo.
The email notice, which was reviewed by The Times, instructed residents to remove any burnt cars from their lots as quickly as possible, since contractors cannot dispose of vehicles without possessing the title. It followed months of near silence from the owners.
“The day before Christmas Eve … it triggers everybody and throws everybody upside down,” said Jon Brown, who lived in the Bowl for 10 years and now helps lead the fight for the residents’ right to return home. “Am I liable if I can’t get this done right now? Between Christmas and New Year’s? It’s just the most obnoxious, disgusting behavior.”
Brown is not optimistic the owners will follow through. “They’ve said things like this before over the years with a bunch of different things,” he said, “and then they find some reason not to do it.”
Earlier this year, the Federal Emergency Management Agency denied requests from the city and the Bowl’s owners to include the park in the U.S. Army Corps of Engineers cleanup program, which FEMA said was focused on residential lots, not commercial properties. In a letter, FEMA argued it could not trust the owners of the Bowl to preserve the beachfront property as affordable housing.
A tattered flag waves in the wind at Asilomar View Park overlooking the Pacific Palisades Bowl Mobile Estates.
(Myung J. Chun/Los Angeles Times)
The Bowl, which began as a Methodist camp in the 1890s, was purchased by Edward Biggs, a Northern California real estate mogul, in 2005 and split between his first and second wives after his death in 2021. The family has a history of failing to perform routine maintenance and seeking to redevelop the park into a more lucrative resort community.
After FEMA’s rejection, the owners failed to meet the City of L.A.’s debris removal deadlines. In October, the city’s Board of Building and Safety Commissioners declared the park a public nuisance alongside seven other properties, giving the city the authority to complete the debris removal itself and charge the owners the bill.
But the city has yet to find funds to front the work, which is expected to cost millions.
On Dec. 10, City Councilmember Traci Park filed a motion that would order the city to come up with a cost estimate for debris removal and identify funding sources within the city. It would also instruct the city attorney’s office to explore using criminal prosecution to address the uncleared properties.
The Department of Building and Safety did not immediately respond to requests for comment.
Despite the recent movement on debris removal, residents of the Palisades Bowl still have a long road ahead.
On Wednesday, numerous burnt out vehicles still remained at the Pacific Palisades Bowl Mobile Estates. The owners instructed residents they must get them removed as quickly as possible.
(Myung J. Chun/Los Angeles Times)
In mobile home parks, tenants lease their spaces from the landowners but own the homes placed on the land. Before residents can start rebuilding, the Bowl’s owners need to replace or repair the foundations for the homes; fix any damage to the roads, utilities and retaining walls; and rebuild facilities like the community center and pool.
The owners have not responded to multiple requests for comment, but in February, Colby Biggs, Edward Biggs’ grandson, told CalMatters that “If we have to go invest $100 million to rebuild the park and we’re not able to recoup that in some fashion, then it’s not likely we will rebuild the park.”
Mobile home law experts and many residents doubt that the Biggs family would be able to convert the rent-controlled mobile home park into something else under existing law. The most realistic option, should the Biggs decide against rebuilding, would be to sell the park to another owner — or directly to the residents, a course of action the residents have been actively pursuing.
The lack of communication and action from the owners has nonetheless left the Bowl’s eclectic former community of artists, teachers, surfers, first responders and retirees in limbo.
Many are running out of insurance money for temporary housing and remain unsure whether they’ll ever be able to move back.
Science
Video: Drones Detect Virus in Whale Blow in the Arctic
new video loaded: Drones Detect Virus in Whale Blow in the Arctic
By Jamie Leventhal and Alexa Robles-Gil
January 2, 2026
Science
Commentary: ‘Stop exercising, you’re killing yourself.’ Not really, but try more nurture, less torture in 2026
One day my left foot hurt for no good reason. I stood up to shake off the pain and tweaked my right Achilles tendon, so I headed for the medicine cabinet, bent over like an ape because of a stiff back.
Actually, I lied.
It wasn’t one day. It’s pretty much every day.
None of this is severe or serious, and I’m not complaining at the age of 72. I’m just wondering.
Are my exercise routines, which were meant to keep me from falling apart, slowing my demise, or accelerating it?
What better time than the start of a new year to get an answer? In one poll, the top New Year’s resolution for 2026 is exercising more. Also among the top six resolutions are eating healthier, improving physical health and losing weight, so good luck to all you dreamers, and I hope you last longer than I have with similar resolutions.
Instead of a resolution, I have a goal, which is to find a sweet spot — if there is one — between exercise and pain.
Maybe I’m asking too much. I’ve had two partial knee replacements, I’ve got a torn posterior cruciate ligament, a scar tissue knob on a frayed Achilles tendon, a hideously pronated left foot, a right shoulder that feels like it needs an oil change, and a pacemaker that keeps on ticking.
But I decided to get some expert advice that might be useful for anyone who has entered this glorious phase of life in which it’s possible to pull a muscle while taking a nap, or pinch a nerve in your neck while brushing your teeth.
And I knew just whom to call.
Cedars-Sinai orthopedic surgeon Robert Klapper hosts an ESPN radio show called “Weekend Warrior.” This lab-coated Renaissance man, a surfer and sculptor in his spare time, also weighs in regularly on the radio with “Klapper Vision” — clear-eyed takes on all manner of twisted, pulled and broken body parts suffered by elite athletes and banged-up buzzards like me.
On “Weekend Warrior,” Klapper might be talking about knee replacement surgery one minute, segue to Michelangelo’s rendering of the human form, and then insist that a sandwich is not a sandwich without peperoncini. It isn’t necessarily all connected, but it doesn’t matter.
When I emailed Klapper about my aches and pains, he responded immediately to say he’s written one book on hips, another on knees and a third one is in the works with the following title:
“Stop Exercising, You’re Killing Yourself.”
No, he’s not saying you should never get off the sofa. In a phone conversation and later at his office, Klapper said the subtitle is going to be, “Let Me Explain.” He’s making a point about what kind of exercise is harmful and what kind is helpful, particularly for people in my age group.
Dr. Robert Klapper holds up his book about preventing hip surgery.
(Genaro Molina/Los Angeles Times)
My daily routine, I told him, involves a two-mile morning walk with my dog followed by 30 minutes of swimming laps or riding a stationary bike.
So far, so good.
But I also play pickleball twice a week.
“Listen, I make a living from pickleball now,” Klapper said. “Exercise is wonderful, but it comes in two flavors.”
One is nurturing, which he calls “agercise” for my demographic.
The other is abusive, and one of Klapper’s examples is pickleball. With all its starts and stops, twists and turns, reaches and lunges, pickleball is busting the Medicare bank, with a few hundred million dollars’ worth of injuries each year.
I know. The game looks pretty low key, although it was recently banned in Carmel-by-the-Sea because of all the racket. I had no idea, when I first picked up a paddle, that there’d be so much ice and ibuprofen involved, not to mention the killer stares from retirees itching for a chance to drill you in the sternum with a hot laser.
“This is a sport which has the adrenaline rushing in every 50-year-old, 60-year-old, 80-year-old,” Klapper told me in his office, which is the starting point in his joint replacement factory. The walls are covered with photos of star athletes and A-list Hollywood celebrities he’s operated on.
“I see these patients, but they’re not coming to me with acute injuries. They didn’t snap their Achilles tendon … like they do in tennis. They’re not snapping their ACL like they are in pickup basketball,” Klapper said. “They’re coming to me saying, ‘My shoulder is killing me, my knee is killing me.’ ”
Pickleball has obvious conditioning benefits for every age group. But it can also worsen arthritis and accelerate joint degeneration, Klapper said, particularly for addicts who play several times a week.
Not that he’s the first MD to suggest that as you age, walking, cycling and swimming are easier on your body than higher-impact activities. As one doctor said in an AARP article on joint care and the benefits of healthy eating, watching your weight and staying active, “the worst thing you can do with osteoarthritis after 50 is be sedentary.”
Still, I thought Klapper might tell me to stop pickling, but he didn’t.
“Pickleball is more than a sport to you … and all of your compadres,” he said. “It’s mental. You need it because of the stress. The world’s falling apart.… I want you to play it, but I want you to do the nurturing exercises so you can do the abuse.”
There’s no fountain of youth, Klapper said, but the closest thing is a swimming pool.
OK, but I already swim three times a week.
Dr. Robert Klapper meets with patient Kathleen Clark, who is recovering from knee surgery.
(Genaro Molina/Los Angeles Times)
Klapper had different ideas.
“You need to be walking forward and backwards for half an hour,” he said. Do that three times a week, he told me, and ride a stationary bike three times.
Why the water walking?
“We as humans take over a million steps a year. Forget pickleball, just in … daily living,” Klapper said, so I’m well beyond 72 million steps.
“Think about that,” he said.
Do I have to?
Water walking will develop muscles and joints without the stress of my full weight, and that could “optimize” my pickleball durability and general fitness, Klapper said. Buoyancy and the touch of water on skin are magic, he said, but there’s science involved too.
“It’s hard to move your arms and legs and your body through water, and yet it’s unloading the joint,” Klapper said. “And finally — and this is the real X factor — when you close your eyes and straighten your elbow and bend your elbow, straighten your knee and bend your knee … your brain knows where your limbs are in space.”
This is called proprioception, Klapper said. Receptors in your skin, muscles, ligaments and tendons send messages to your brain, leading to better balance, coordination and agility and potentially reducing risk of injury.
There are lots of exercises for sharpening proprioception, but the surfing doctor is partial to bodies of water. At my age, he said, my proprioception “batteries are running low,” but I can recharge them with a short break from pickleball and a focus on the pool.
“You can’t guarantee anything in life and medicine,” Klapper said. “But I guarantee you, a month into it, you’re going to feel so much better than you do at this moment.”
It’s worth a try, and I’ll let you know how it goes.
In the pool and on the court.
steve.lopez@latimes.com
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