The Strength Test That Has Nothing to Do With How Much You Can Lift

I track my working weights to the pound. I know my rep scheme on every lift I do this month, and most of what I did last month. I have a spreadsheet-shaped brain for training, and I have used it for years to answer exactly one question: am I getting stronger.

Then I read a study that measured something I have never once tracked. How fast a person can stand up from a chair, five times in a row, with their arms crossed on their chest. It predicted who was still alive eight years later better than almost anything else in the analysis.

Not a heavier deadlift. Not a bigger squat. A chair stand. It's the kind of movement I do a hundred times a week without thinking about it, and I have never once timed it.

That bothered me more than it should have. I have built an entire identity around being a person who measures his training. It turns out I had been measuring the wrong things, or at least missing one of the right ones.

So I want to walk through what the study actually found, what a stopwatch and a kitchen chair taught me about my own assumptions, and, because this is the part almost no coverage of a study like this bothers with, exactly what it does not prove.

What the Study Actually Measured

The paper is from JAMA Network Open, published in February 2026, led by Michael LaMonte's group out of the University at Buffalo. It draws on a cohort called OPACH, the Objective Physical Activity and Cardiovascular Health study, an offshoot of the long-running Women's Health Initiative. 5,472 women, ages 63 to 99, mean age 78.7. They were followed for a mean of 8.4 years. During that stretch, 1,964 of them died.

At baseline, researchers measured two things that take about ninety seconds combined. First, grip strength: seated, elbow bent to 90 degrees, squeezing a hand dynamometer as hard as possible, best of two tries. Second, the chair stand: five consecutive sit-to-stands, no hands, arms crossed on the chest, timed with a stopwatch. Both are part of a standard geriatric assessment called the Short Physical Performance Battery, not a piece of gym equipment. It's a doctor's-office test.

Sorted into quartiles and adjusted for the usual suspects (age, smoking, income, chronic disease, the works), the women in the top quartile for grip strength, above 24 kilograms, had 33% lower all-cause mortality than the women in the bottom quartile. The women in the fastest chair-stand quartile, 11.1 seconds or less for five stands, had 37% lower mortality than the slowest. Both trends were statistically clean, with a p for trend under .001, and both held up even after the researchers separately adjusted for how much moderate-to-vigorous activity or walking the women did. This wasn't just a fancy way of saying the ones who move more live longer. Something about grip and chair-stand speed specifically was carrying information the activity questionnaires weren't capturing.

I Tried the Test on Myself

I didn't have a dynamometer lying around, so I did the part I could: the chair stand. Kitchen chair, no armrests, arms crossed, five reps, no hands.

It is a strange feeling to do a "test" that involves an action you already perform dozens of times a day without a second thought, and to notice, mid-rep, that you are paying attention to it for the first time. By the third stand I could feel exactly which part of the movement I would cheat if I were tired, hurt, or eighty. Leading with momentum instead of the quadriceps and glutes actually doing the work. That's the part a stopwatch is quietly measuring. Not whether you can stand up. Whether you can stand up well, under time pressure, using the muscles that are supposed to do it.

I'm not going to hand you a number, because a single untrained man doing five chair stands in his kitchen on a Tuesday is not data, and I'd rather not turn my own anecdote into the kind of vibes-based statistic this article is explicitly arguing against. What I'll say instead is this: it was easier than I expected for a "geriatric assessment," and that gap, between how the test sounds and how ordinary it actually is, is exactly the point. This is not a fitness test built for athletes. It's a floor. And a lot of people, including people who lift weights regularly, have never checked whether they're above it.

A chair stand isn't asking whether you can stand up. It's asking whether you can stand up well, under time pressure, using the muscles that are supposed to do it.

What This Study Does Not Show

This is the section I'd want up front if I were reading someone else's version of this piece, so I'm not burying it near the end.

It cannot tell you that being stronger caused these women to live longer. This is an observational cohort, not a trial. Nobody was randomized into a "get stronger" group. The authors say this plainly themselves: the associations "could be influenced by residual confounding or reverse causation." Reverse causation is the uncomfortable one. It's entirely possible that early, undetected illness was already making some women weaker and frailer years before it killed them, which would produce this exact pattern without grip strength itself doing anything protective at all.

It cannot tell you this applies to me, or to most people reading this. The cohort was women only, ages 63 to 99. I am a 54-year-old man. The study says nothing, literally nothing, about men, and nothing about anyone in their 40s or 50s. Extrapolating a finding in women in their late 70s and 80s onto a midlife audience is exactly the kind of move that turns a careful study into a sloppy headline. I'll come back to a study that speaks more directly to midlife in a moment, but it's a different study, with its own limits.

It cannot tell you that lifting weights specifically is what builds this. Here's a number that reframes the whole thing: according to CDC survey data from 2020, only 17.2% of American women 65 and older meet the federal guideline for muscle-strengthening activity, which is two sessions a week, minimum. Among women 45 to 64, it's 23.8%. In other words, the overwhelming majority of women in a cohort like OPACH's were almost certainly not doing structured resistance training. Their grip strength and chair-stand speed are much more likely reflecting general functional capacity, health status, and probably a fair amount of genetics, than any specific training habit. That doesn't make the finding useless. A marker of vitality is still worth knowing about, but it does mean you shouldn't read this as "science proves lifting weights adds years to your life." That's a different, much harder claim to prove, and this study doesn't attempt it.

It cannot tell you the whole story is even the strength testing itself. The study excluded women with severe upper-limb disability, prior stroke, disabling arthritis, from the grip measurement. The very weakest of the weak, by that specific criterion, aren't in this data at all.

A marker of vitality is still worth knowing about. It just isn't proof that a specific training habit is what's driving it.

The Midlife Version of the Same Signal

Because the JAMA study can't speak to my age bracket, I went looking for one that could, and found something better suited to a 54-year-old than I expected: a 2021 paper in BMC Geriatrics using Britain's 1946 birth cohort, the National Survey of Health and Development, one of the longest-running birth cohort studies in the world.

Researchers had grip strength measurements on 446 people at ages 53, 60 to 64, and 69. They also had brain MRIs and cognitive testing at 69 to 71. Lower grip strength at 53, one year younger than I am right now, predicted smaller whole-brain volume nearly two decades later. Higher grip strength measured later, at 60-to-64 and at 69, was associated with larger brain volume at the same visit. Lower grip strength was also consistently tied to lower scores on a nonverbal reasoning test.

I want to be honest about the size of this finding and not dress it up. Four hundred and forty-six people is a modest sample. The cohort is entirely British, and, in the specific sub-study used for the brain scans, healthier and more educated than the general 1946 cohort, which almost certainly means the people included were the ones who stayed well enough, and interested enough, to keep showing up to a research clinic for seventy years. That's a real form of selection bias, and the paper's own authors say so. The finding for white matter damage was inconsistent across the different ages measured. It didn't hold up as cleanly as the whole-brain-volume result, and I'm flagging that rather than quietly leaving it out because it doesn't fit the narrative.

There's also a reverse-causation problem here too, and it's worth naming directly: the researchers didn't have brain scans from age 53, only from decades later. That means they can't rule out that early, undetectable neurodegeneration was already suppressing grip strength at midlife, rather than weak grip strength somehow damaging the brain over the following two decades. Both stories are consistent with the same data.

Even with all of that said, two separate observational studies, in two very different populations, using two different outcomes, both landing on grip strength as a signal worth watching, is a more interesting coincidence than either study is alone. Coincidence is not proof. But it's the kind of pattern that earns a second look, not a shrug.

Why Structured Training Might Matter, and Why This Doesn't Prove It

There's a third study I want to bring in, mostly to show you what real mechanistic evidence looks like, and how much smaller and more limited it usually is than the population studies that make headlines.

A 2026 paper in Nature Aging, out of Amsterdam UMC and Maastricht University, took muscle biopsies from four small groups: young adults around 23, trained older adults around 68 who exercised three or more hours a week, normally active older adults, and physically impaired older adults. Roughly 47 people total. They looked at which genes were switched on or off in each group's muscle tissue.

In the trained older adults, more than half of the age-related changes in gene expression that showed up in the untrained older group were simply absent. Their muscle's response to a single bout of exercise looked more like a 23-year-old's response than like their own untrained peers' did.

That's a genuinely interesting mechanistic clue about why staying structurally active might blunt some effects of aging at the cellular level. It is also a 47-person biopsy study with no mortality outcome, no disability outcome, and no chair-stand test anywhere in it. It cannot tell you that training is what produced the grip strength and chair-stand results in the JAMA cohort. That's a different population, a different design, and a different question entirely. What it can tell you is that "structured training changes muscle biology in ways that look protective" is a plausible hypothesis with some real cellular evidence behind it, not an established fact connecting the dots all the way to who lives longer. I'd rather tell you the honest, more limited version of that story than borrow its confidence for a claim it doesn't support.

What Gets Measured Gets Managed: On the Gym Floor and in the Org Chart

For twenty years I've led platform engineering teams, and there's a version of this exact mistake I've made professionally more times than I'd like to admit: picking the metric that's easiest to brag about instead of the one that actually predicts whether the system holds up under load.

Uptime percentage looks great on a slide. It says almost nothing about whether your on-call engineer can actually diagnose an incident at 3 a.m. without burning out. Lines of code shipped feels like progress. It says nothing about whether the thing you shipped needs to be rewritten in six months. The number that's easy to track and easy to show off is rarely the number that tells you the truth about the system's actual resilience, and the boring, unglamorous number usually is.

A chair stand is the fitness equivalent of the boring, unglamorous metric. It doesn't show up on a lifting log. Nobody posts their five-stand time. It doesn't flatter the version of yourself that wants training to be about how much you can move, rather than how well your body actually functions under ordinary demand. But it's closer to what your life actually requires of you: getting off a plane, off the floor after playing with a grandkid, off a low couch without using your hands, than most of what happens in a gym.

I'm not dropping my strength training because of this. The evidence for structured resistance work, dosed sensibly, a couple of times a week, has its own solid support, and I've written about that separately. What changed is smaller and more honest: I added the boring test to the list of things worth occasionally checking, instead of only tracking the numbers that make for a good training log entry.

The number that's easy to track and easy to show off is rarely the number that tells you the truth. The boring one usually is.