Grip Strength and Fracture Risk: What the Evidence Really Shows

Does grip strength predict fracture risk?

Low grip strength is consistently linked to a higher risk of falls and fractures — but this is an association, not proof that weak grip causes broken bones. In a four-year study of 10,092 middle-aged and older adults, those in the strongest grip group had roughly half the odds of hip fracture compared with the weakest group (adjusted odds ratio 0.46), and lower odds of falls (0.62) Guo et al., Orthopaedic Surgery, 2024. The authors are explicit that the study is observational and cannot establish cause and effect.

That distinction matters. Squeezing a dynamometer harder will not, by itself, make your hip unbreakable. Grip strength is valuable precisely because it is a proxy — a quick, cheap window onto something bigger going on in the body.

Why is hand-grip strength used as a marker of whole-body strength?

Grip strength is popular because it is simple, inexpensive and correlates well with strength elsewhere in the body. A single squeeze of a hand-held device gives a number in kilograms that tracks reasonably closely with leg strength, mobility and overall physical function — without needing a gym full of equipment.

It is not perfect. Grip reflects the muscles of the hand and forearm, and readings are affected by hand size, arthritis or wrist pain, technique and which device is used. But as a first-pass screen, it is one of the most practical strength measures in clinical use, which is why it has become a standard research and bedside tool.

How does grip strength fit into sarcopenia and frailty?

Low grip strength is the entry point for identifying sarcopenia — the age-related loss of muscle mass and strength. Under the widely used European framework, low muscle strength (measured by grip or a chair-stand test) flags probable sarcopenia, which is then confirmed by measuring muscle quantity or quality Cruz-Jentoft et al., Age and Ageing, 2019. The same guideline sets the screening thresholds for low strength at under 27 kg for men and under 16 kg for women.

Grip strength also appears as the "weakness" component in several widely used measures of frailty — the broader state of reduced physiological reserve that leaves older people more vulnerable to falls, illness and slow recovery. In other words, a weak grip is rarely a problem with the hand; it is usually a signal about the whole person.

If this is new territory, our guide to sarcopenia and muscle loss after 50 explains why muscle fades with age and what slows it down.

What links low grip strength to poorer bone-health outcomes?

The connection to bone is real but indirect — grip strength measures muscle, not bone. There are two main bridges between the two.

First, muscle and bone decline together. When low muscle mass and strength coincide with low bone density, clinicians call it osteosarcopenia — a "double whammy" that raises fracture risk more than either condition alone. Muscle also physically pulls on bone, and that loading is one of the signals that keeps bone strong.

Second, and more importantly, weaker people fall more. Most fragility fractures do not happen spontaneously — they happen when someone with fragile bone hits the ground. Poor grip strength travels with poorer balance and slower reactions, so it acts as a barometer for fall risk. Beyond bone, low grip strength has also been inversely associated with all-cause mortality in large international cohorts Leong et al., The Lancet, 2015 — that study looked at mortality and heart disease, not fractures, but it underlines how much a simple squeeze can reveal about overall health.

How is grip strength measured, and what counts as low?

Grip strength is measured with a hand-held dynamometer — you squeeze it as hard as you can, usually for a few seconds, and the best of two or three attempts on each hand is recorded in kilograms. A well-known example is the Jamar-style device found in many physiotherapy and research settings.

As a rough guide, the EWGSOP2 screening cut-offs are under 27 kg for men and under 16 kg for women. These are thresholds to prompt further assessment, not a verdict — a reading below them means "look more closely", not "you have a disease". Because posture, elbow position, encouragement and the specific device all change the number, results are most meaningful when measured consistently and tracked over time rather than read once in isolation.

Can you improve your grip strength?

Yes — muscle strength responds to training at any age, and grip is no exception. The most direct approach is resistance training: weights, resistance bands or bodyweight moves that work the major muscle groups. The NHS advises adults to do muscle-strengthening activities on at least two days a week, and for older adults specifically it adds balance and co-ordination work, noting that "doing exercises to improve your strength, balance and flexibility will help make you stronger and feel more confident on your feet" NHS, Physical activity guidelines for older adults, 2024.

For bone specifically, the Royal Osteoporosis Society recommends a combination of strength and impact exercise, with balance work to reduce the risk of falls and broken bones Royal Osteoporosis Society, Exercise for bones, 2024. The honest framing is this: building strength is a sound goal for muscle health and fall prevention, and those things plausibly help your bones — but a stronger grip is not a guarantee of a stronger skeleton.

Where does bone screening fit in?

Grip strength answers a question about your muscles; it cannot tell you what is happening inside your bones — and that is the other half you need. If your grip is low, or you have other risk factors such as menopause, being over 50, or a family history of fractures, it is a sensible moment to check your bone density directly.

Standard DEXA scans use a small dose of X-ray. REMS (Radiofrequency Echographic Multi Spectrometry) is radiation-free, so it can be repeated safely to monitor change over time — which suits anyone tracking muscle and bone health alongside a training programme. You can book a radiation-free bone health assessment or read more about our bone health assessment.

Think of it as two readings that belong together: a dynamometer for your muscles, and a bone scan for your skeleton. On their own, each tells half a story.

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This article is part of our muscle health and bone strength series. To go deeper, see sarcopenia and muscle loss after 50 and osteosarcopenia.