A grip strength test tells you how robust your body is as a whole, and in a study of 139,691 adults across 17 countries it carried more predictive weight for mortality than systolic blood pressure did. That is a striking sentence, so here is the qualification immediately: this is an association, not a mechanism. Grip strength is a readout of your general condition, not a dial you can turn. Squeezing a gripper for six weeks will raise your grip number and change nothing else about you.

What makes the test worth doing anyway is that it is fast, cheap, standardised and hard to fool. Thirty seconds, a device you can buy once and keep, and a set of British reference figures you can place yourself against. Very little else in the measurement world offers that combination.

Expertise reviewed by Mariyan Voykov, Manager and Senior Coach at Body Transformation London. MSc Sports and Exercise Science, BSc Biomedical Science, Level 3 Personal Trainer.

This piece sits under our main guide to losing fat without losing muscle. Where that guide covers training and nutrition, this one is about a single, unusually informative measurement.

What does a grip strength test actually predict?

The headline evidence comes from a study of 139,691 adults across 17 countries, followed for a median of four years. Each 5 kg reduction in grip strength was associated with an all-cause mortality hazard ratio of 1.16 (95% CI 1.13 to 1.20) and a cardiovascular mortality hazard ratio of 1.17 (1.11 to 1.24). In the same analysis, grip strength was a stronger predictor of mortality than systolic blood pressure.

Blood pressure is one of the measurements the NHS Health Check offers every five years to adults aged 40 to 74. The point of the comparison is not that blood pressure does not matter. It is that a thirty-second squeeze on a handheld device sits in the same conversation as a measurement the health service takes seriously, and almost nobody in a gym has ever recorded one.

That is the argument for doing it. It is not an argument for panicking about the result.

Does training my grip lower my risk?

No, and this is the part most articles on this subject get wrong.

The study above is observational. It shows that people with weaker grips died at higher rates over the follow-up period. It does not show that the weak grip caused those deaths, and it does not show that improving a grip score changes anything downstream. Grip strength is best understood as a proxy: a cheap window onto whole-body muscle function, nervous system integrity, nutritional status and general robustness, all of which move together.

The practical consequence is specific. If your grip is below where you would like it, the intervention is not a gripper. Buying a spring-loaded hand trainer will improve your next test score without altering what the score was standing in for. You will have broken your own instrument.

What plausibly moves the underlying condition is the boring, well-evidenced stuff: resistance training that loads the whole body, enough protein, enough sleep, and staying active. In a systematic review of 114 trials and 4,184 participants, resistance training alone was the most effective intervention for increasing lean mass against untrained controls (0.8 kg, 95% CI 0.6 to 1.0, p<0.001). In 160 older adults randomised in a New England Journal of Medicine trial, strength rose 18 to 19% in the programmes containing resistance training against 4% for aerobic training alone, and combined aerobic plus resistance training produced the largest gain in physical performance. Grip follows from that kind of work. It is not the target.

What is a normal grip strength for a UK adult?

This is where the test earns its place, because British normative data exists and it is good. Pooled results from 49,964 participants across 12 British studies put peak grip strength at 51 kg in men, at ages 29 to 39, and 31 kg in women, at ages 26 to 42. Both sexes peak at around age 32, then decline gradually.

Two things follow. First, if you are 45 and your grip is not 51 kg, that is expected, not alarming. Peak is peak. Second, those figures give you something a body composition printout cannot: a population you can locate yourself within, drawn from people who live where you live.

At the other end, the European working group consensus on sarcopenia (EWGSOP2) sets cut-offs for probable sarcopenia that are worth knowing precisely, because they are far lower than most people assume.

These are research thresholds used to decide who needs further assessment. They are not a diagnosis, and only a doctor can make one. If you fall below them, that is a conversation for your GP.

Note the gap. UK peak in men is 51 kg and the concern threshold is 27 kg. A healthy 50-year-old man reading 40 kg is nowhere near the cut-off, and the honest framing of that number is “well within normal, with room to build”, not “declining”.

Why is a grip test better than the muscle mass number on a scan?

Because function is what is actually at stake, and function is measured with far less error.

When someone loses weight quickly, the thing worth protecting is not a figure in a lean mass column. It is the ability to carry shopping up stairs, get off the floor, and hold on to something when they slip. A grip test, a chair-stand test and a walking pace measure that ability directly.

The measurement case is just as strong. Both a scanner and a tape measure carry more error than people expect, which we set out in DEXA vs InBody and our waist-to-height ratio guide. Against that background, a dynamometer squeezed three times in each hand under a fixed protocol is a remarkably clean signal, and it costs nothing per repeat.

None of this means the scan is worthless. It means the free tests are not the consolation prize. If your scan says lean mass fell 0.8 kg but your grip, your chair stands and your working sets in the gym all held, the sensible reading is that the scan moved and you did not. We go through that logic in detail in our guide to whether you are losing muscle or fat.

How do I do a grip strength test properly?

Consistency matters more than the absolute number, because you are mostly interested in your own trend.

1. Use a hand dynamometer. Adjust the handle so your second knuckle sits at roughly a right angle. Write the setting down and use the same one every time.
2. Sit upright, feet flat, shoulder relaxed and down, elbow bent to 90 degrees and tucked in at your side, forearm neutral, wrist straight.
3. Squeeze hard for about three to five seconds, exhaling. No swinging the arm, no leaning, no bracing the device against your leg.
4. Three attempts per hand, alternating, with 30 to 60 seconds of rest between. Record the best reading from each hand.
5. Test under the same conditions each time: same time of day, not immediately after a heavy pulling session, and not with cold hands.

Two companions cost nothing at all:

Five chair stands. From a standard dining chair, arms folded across your chest, stand fully and sit fully five times as fast as you safely can. Time it. Over 15 seconds is the consensus threshold worth noting.

Gait speed. Mark out four metres, walk at your usual pace with a running start, and time the marked section. Divide four by the seconds taken. 0.8 m/s or slower is the threshold.

Record all three at the start of any weight loss phase, then repeat every three to four weeks alongside your scan. Read them the way you read a scan: on the trend across two to three months rather than on the gap between any two tests. If the number on a scan wobbles but all three of these hold steady across that line, your function is intact and the scan is telling you about water.

What to do with your result

If your figures sit comfortably above the cut-offs, log them and move on. A baseline is only useful once you have something to compare it with later.

If your grip has been falling over several tests while your chair stands slow and your gym numbers drop, that pattern is worth acting on, and the action is almost always more food, more protein and more resistance training rather than more restriction. If you have an unexplained loss of strength or function that training does not account for, that is a conversation with your GP, not with a coach.

If you want your grip, chair stands, gait speed and training measured on a protocol and programmed around rather than guessed at, book a call. If you would rather buy a dynamometer and do it in your kitchen, that is a perfectly good answer, and the instructions above are the whole method.

Free InBody scan until 30 September

We are running complimentary body composition scans at our Finchley Road studio, Monday to Friday between 10am and 2pm. Thirty minutes: the scan itself, plus a coach taking you through what your numbers mean and which ones to ignore. No charge, no obligation, one per person.

Book your free scan or see what’s included.

This article is general information, not medical advice. If you have a medical condition, are pregnant, are taking any prescribed medication, or have a history of disordered eating, speak to your GP or a registered dietitian before changing how you train or eat.

Frequently asked questions

What is a good grip strength test result for my age?
UK data from 49,964 people across 12 British studies puts peak grip at 51 kg in men (ages 29 to 39) and 31 kg in women (ages 26 to 42), with both peaking around age 32 and declining gradually after. Use those as the top of the curve rather than a target, and note that the European consensus threshold for probable sarcopenia is much lower, at under 27 kg for men and under 16 kg for women.

Does a grip strength test really predict mortality?
It is associated with it. Across 139,691 adults in 17 countries followed for a median of four years, each 5 kg reduction in grip strength was associated with all-cause mortality HR 1.16 (95% CI 1.13 to 1.20), and grip was a stronger predictor than systolic blood pressure. That is an association in a population, not a prediction about an individual, and it does not mean grip strength causes anything.

Will training my grip improve my health?
There is no evidence that it does. Grip strength is a marker of general robustness rather than a lever, so improving the number in isolation, with a gripper for example, changes the reading without changing what it was standing in for. Whole-body resistance training, adequate protein and staying active are the things with trial evidence behind them.

Should I use a grip strength test instead of a body composition scan?
Use both, for different jobs. A scan tracks the fat and lean compartments as a trend; a grip test tracks function, which is what is actually at stake when you lose weight. The function tests are free, standardised and lower in measurement error than the scanner’s muscle mass readout, so they are not a downgrade.

How often should I test?
Every three to four weeks is a good interval for accountability, alongside a baseline before any weight loss phase begins, but judge progress on the trend across two to three months rather than on any single gap between tests. One test on its own mostly measures how well you slept and how warm your hands are. Several across a couple of months measure you.

Sources

• Leong DP et al. Grip strength and mortality, 139,691 adults across 17 countries. The Lancet, 2015;386(9990):266-273. https://doi.org/10.1016/S0140-6736%2814%2962000-6
• Cruz-Jentoft AJ et al. Sarcopenia: revised European consensus on definition and diagnosis (EWGSOP2). Age and Ageing, 2019;48:16-31. https://doi.org/10.1093/ageing/afy169
• Dodds RM et al. Grip strength across the life course: normative data from twelve British studies, 49,964 participants. PLOS ONE, 2014;9(12):e113637. https://doi.org/10.1371/journal.pone.0113637
• Lopez P et al. Resistance training effectiveness on body composition: systematic review and meta-analysis, 114 trials, 4,184 participants. Obesity Reviews, 2022. https://onlinelibrary.wiley.com/doi/10.1111/obr.13428
• Villareal DT et al. Aerobic or resistance exercise, or both, in dieting obese older adults. NEJM, 2017;376:1943-1955. https://www.nejm.org/doi/full/10.1056/NEJMoa1616338
• NHS Health Check. NHS. https://www.nhs.uk/conditions/nhs-health-check/

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