Grip strength
Also called: handgrip strength test, dynamometer test
What it means
Grip strength is how hard you can squeeze with your hand, measured with a device called a dynamometer. It's used as a simple marker of overall muscle strength and physical function.
Low grip strength is linked to weaker muscles, higher fall and fracture risk, and can signal reduced mechanical loading that bones need to stay strong.
Grip strength is usually measured with a handheld dynamometer: you squeeze it as hard as you can, and the device records the force. It's a quick, low-cost test, and doctors and researchers use it as a window into your overall muscle strength, since hand muscles tend to reflect whole-body strength fairly well.
Grip strength matters for bone health because muscle and bone are closely linked. Stronger muscles generally mean more mechanical loading on bone, which can support bone maintenance over time. Low grip strength is one of the signs used to identify sarcopenia (age-related muscle loss), and when sarcopenia and osteoporosis occur together, it's sometimes called osteosarcopenia.
Weak grip strength has also been linked to higher risk of falls, fractures, and frailty, so it's increasingly used alongside tests like gait speed and timed up-and-go to get a fuller picture of physical function, not just bone density. Because strength can change over shorter stretches of time than bone density typically does, some clinicians check grip strength more often than they repeat a bone density scan.
A simple hand squeeze test reveals overall muscle strength and hints at your fall and fracture risk.
Where this leads
WordWeak grip often reflects weaker muscles overall. Curious about the gradual age-related muscle loss that ties closely to bone health?
Where the Academy teaches it
This page is the short version. The lessons teach it in full, with the context around it and a quiz to lock it in.
Related words
Sarcopenia is the gradual loss of muscle mass and strength that comes with aging, and it's closely tied to bone health.
Osteosarcopenia is when a person has both osteoporosis (weak, low-density bone) and sarcopenia (loss of muscle mass…
The Timed Up and Go (TUG) test times how long it takes someone to stand up from a chair, walk a short distance,…
Gait speed is how fast you walk at your normal pace, usually measured over a short, fixed distance like 4 meters.…
Dynapenia is the age-related loss of muscle strength and power that isn't fully explained by loss of muscle size alone.
Fall risk is how likely you are to fall, and it matters because falling—not just weak bones—is the most common cause…
Education only, not medical advice. Decisions about tests, medications and treatment belong with your own doctor. OsteoStrong does not diagnose, treat or cure any disease.
