Grip strength: the cheapest lifespan predictor you can train yourself

A ten-second measurement, a prediction for decades

Imagine your mortality risk could be measured in ten seconds with a cheap handheld device, no blood draw, breathing mask or treadmill test required. It already exists: a hand dynamometer. The force with which you squeeze it, your grip strength, is one of the best-studied and easiest-to-measure predictors of how long you'll live. We wrote earlier about VO2max as a strong predictor; grip strength measures something different, namely muscular strength rather than cardiorespiratory capacity, and turns out to carry its own, independent predictive value on top of that.

What grip strength actually measures

A hand dynamometer measures the maximum force of your grip, usually in kilograms, with the dominant hand and the best of three attempts. It isn't a test of how strong specifically your hands are, but a proxy for your overall muscle mass and quality: people with a weak grip tend, on average, to also have less strength in their legs, back and core. That's exactly why it's such a useful, quick snapshot of your general muscular condition, without needing a full strength test.

What the largest study to date shows

Researchers at the University of Glasgow followed 502,293 UK Biobank participants, aged 40 to 69 at baseline, for an average of 7.1 years (Celis-Morales et al. 2018, The BMJ). Every 5 kg lower grip strength was associated with a 20% higher risk of death from any cause in women and 16% higher in men, even after adjusting for age, smoking, BMI, physical activity and socioeconomic background. For cardiovascular mortality the association was slightly stronger still: 19% higher risk in women and roughly 22% higher in men, per 5 kg lost. The researchers themselves describe grip strength as "easily measured, cheap, and highly reproducible" and note that, unlike a breathing-mask test or a lab panel, it can be done in any GP's office or even at home.

Trainable, and not simply by squeezing harder

Just like VO2max, grip strength isn't a fixed trait you're powerless against. A 2025 systematic review (Liao et al., BMC Geriatrics, 12 randomized trials, 538 participants) found a medium-to-large effect of resistance training on grip strength (SMD 0.63). Notably, not every exercise works equally well. Pulling exercises such as lat pulldowns, deadlifts or seated rows produced a substantially larger effect (SMD 0.90) than programmes without them (SMD 0.38), so you improve your grip mainly by training large muscle groups, not by practising on a hand-gripper. More isn't better here either: two sessions a week at moderate intensity (feels fairly demanding, not exhausting) gave the clearest effect; a third weekly session added nothing and, in some studies, even worked slightly against it. The authors themselves flag the limited quality of the evidence, but it's the best signal available today on how much training is enough.

One number, two reasons to track it

Grip strength is therefore both: an early warning (a declining value can signal muscle loss before you notice it elsewhere) and a training target you'll see progress on within weeks, long before a VO2max improvement becomes measurable. Together with strength training for endurance athletes, it gives you a concrete starting point: if you don't know where to begin with resistance training, start with pulling exercises and measure your grip strength every few months.

How HealthyDNA turns this into a concrete plan

A number only means something once you know what it means for you and what to do with it. That's why we bring DNA analysis, blood testing, nutrition and coaching together:

• Blood testing — in partnership with Clinica Montgo in Denia, we map out how your muscle recovery, hormone balance and nutritional status stand today, as a baseline to track progress objectively.
• DNA analysis — gives insight into your predisposition for muscle building and recovery, so your training build-up matches what your body already brings to the table.
• Coaching — turns that information into a training rhythm that fits your life, with someone reviewing and adjusting alongside you instead of a schedule you have to push through alone.

Curious how strong your grip is for your age, and what you can concretely do about it? Get in touch or read more about the DNA analysis and blood testing.

You can't change your birth year. Your VO2max builds up over months. Your grip strength starts showing progress within a few weeks of pulling and deadlifting, and of the three, that might be the fastest measurable win you hold yourself.

This article is general information and does not replace medical advice.