Grip Strength
The cheapest health test you already have access to predicts when you'll die.
Grounded in the research on grip strength
Take the test now
Squeeze something hard. That's it. Grip strength — measured with a handheld dynamometer in seconds — is one of the most validated biomarkers in medicine. It tracks how well your musculoskeletal system, nervous system, and cardiovascular system are all aging at once. It costs under $30 to test at home. Most people never bother.
Know the landmark study
In 2015, Darryl Leong and colleagues published in The Lancet: across 17 countries, 140,000+ adults, low grip strength predicted all-cause mortality, cardiovascular death, and hospital admissions better than systolic blood pressure. That's not a fitness finding — that's a medicine finding. Weak grip was a stronger predictor of dying from heart disease than high blood pressure.