Where your DNA places you among other people, and the studies behind it.
Not tailored to your result, and not medical advice
Work All Major Muscle Groups: Grip strength is used as a stand-in for whole-body muscle strength, so the training that moves it is broad resistance work rather than squeezing a hand gripper. NHS guidance for adults is strengthening activities that work all the major muscle groups (legs, hips, back, abdomen, chest, shoulders and arms) on at least 2 days a week, done in addition to 150 minutes of moderate intensity activity. Carrying heavy shopping, heavy gardening such as digging and shovelling, resistance bands, push-ups and lifting weights all count toward the strengthening days. NHS
Train Regularly, Not Excessively: A 2025 Bayesian network meta-analysis of 13 randomised trials in 711 older adults with sarcopenia found handgrip strength improved across programs running 2 to 6 sessions a week, at 30 to 75 percent of one-repetition maximum, for 4 to 24 weeks. The modelled optimum sat near 3 sessions a week at about half of one-repetition maximum over roughly 19 weeks, with mean differences of around 7 to 9 kg depending on which training variable was modelled. The dose-response curves were inverted U shapes, meaning training well beyond that range showed diminishing returns rather than extra gain. The participants were older adults already diagnosed with sarcopenia, so the sizes of these gains will not carry across to everyone. Frontiers in Physiology (PMC)
Eat Protein Foods Every Day: A 2024 systematic review and meta-analysis of Korean adults aged 65 and over compared habitual protein intake groups against measured grip strength. People eating under 0.8 g per kg of body weight a day, the level used as the dietary reference intake, had higher odds of low handgrip strength than those eating more (odds ratio 1.31), and higher odds of sarcopenia (1.25 versus the 0.8 to 1.2 g/kg group, 1.79 versus the 1.2 g/kg or more group). Those pooled estimates come from cross-sectional data, so they show association rather than cause. Everyday protein foods include fish, eggs, dairy, meat, beans, lentils, tofu and nuts. Nutrients (PMC)
Know What Grip Strength Predicts: In 502,293 UK Biobank participants followed for about 7 years, each 5 kg lower grip strength was associated with higher all-cause mortality (hazard ratio 1.20 in women, 1.16 in men) and with higher cardiovascular and respiratory disease mortality. The authors note that reverse causality is possible in any observational study and that residual confounding is always possible, so grip strength is best read as a marker of overall health rather than a proven cause of those outcomes. Raising the reading on a dynamometer through hand-specific gripper work has not been shown to change the underlying risk. Unexplained weakness, or a noticeable drop in everyday hand function like opening jars or carrying bags, is worth raising with a clinician. The BMJ (PMC)
Expect Only Modest Lifestyle Effects: A 2024 systematic review of 117 longitudinal studies screened 103 candidate factors and found only 10 with consistent associations with grip strength over time. Faster decline tracked with older age, male sex, higher inflammatory markers and existing cardiovascular disease, while depressive symptoms tracked with weaker grip at follow-up. Smoking habits, education level, self-rated health and medication use each showed no consistent association in this review. Much of what is assumed to drive grip strength has not held up when followed over years, so general cardiovascular and mental health are the better-supported levers, and the honest expectation is a modest effect rather than a large one. Journal of Cachexia, Sarcopenia and Muscle (PMC)
How much of this is genetic?
Genetics explains 50% of why people differ in this trait. The rest is environment, daily habits and chance.
Heritability estimate: Twin and family studies
Background and further reading
Grip strength is the amount of static force the hand can squeeze around a dynamometer, typically reported in kilograms or pounds. Although it measures one specific action, it correlates well with whole-body muscle strength and is one of the most practical indicators of musculoskeletal fitness. Because it is quick, cheap, and non-invasive to measure, grip strength is used in research and clinical settings as a proxy for muscle function and general physical robustness. Values rise through childhood and early adulthood, peak in the twenties to thirties, and gradually decline with age.
Genetic Basis: Twin and family studies estimate that a moderate share of the variation in adult grip strength is heritable, with estimates commonly falling in the range of roughly 30 to 65 percent depending on age and population. The trait is highly polygenic. A large genome-wide association study by Willems and colleagues (2017) analyzed hand grip strength in a combined discovery sample of about 195,000 individuals, most of them UK Biobank participants, and identified 16 associated genetic loci, implicating genes involved in the structure and function of muscle and the nervous system, as well as monogenic syndromes affecting psychomotor function. Genes at the associated loci include ACTG1, TGFA, SYT1, PEX14, LRPPRC, KANSL1, GBF1, GLIS1, and a variant in the HLA region. Grip strength shares genetic architecture with lean body mass and other measures of physical performance.
Non-genetic Factors: Grip strength is strongly shaped by modifiable and demographic factors. Age is a major determinant: strength peaks in early adulthood and declines later in life, a process linked to sarcopenia (age-related muscle loss). Resistance and general physical activity build and preserve strength, while inactivity, poor nutrition, and low protein intake reduce it. Body size, occupation, chronic illness, and overall health status also influence measured values. In populations, higher grip strength has been associated with lower risk of cardiovascular disease and all-cause mortality, which is why it is often described as a marker of healthy aging rather than a cause of these outcomes.
The published research behind your score, and the variants it draws on.
7 published scores from 4 studies
The grip strength score combines 7 polygenic scores drawn from 4 published studies.
These traits are influenced by some of the same genes and variants as this one
Lean Body Mass: The fat-free portion of your body: mostly muscle, bone, organs, and water.
Height: Adult standing height - one of the most heritable and polygenic human traits.
Content updated August 2026.
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