A growing body of research suggests that muscle strength may be one of the clearest indicators of long-term health and longevity.
A recent study published in JAMA Network Open followed 5,472 women between the ages of 63 and 99 over an average of eight years and found that stronger women consistently had a lower risk of death, even after researchers accounted for physical activity levels, walking speed, inflammation, and other health factors.
Researchers measured strength using two simple tests: grip strength and a five-times sit-to-stand chair test. Women in the strongest grip-strength category had about a 30% lower risk of mortality compared to those in the weakest group. Faster chair-stand performance was also linked to significantly lower death risk.
The findings were especially notable because strength remained a predictor of longevity even among women who did not meet recommended aerobic exercise guidelines. Researchers say the study reinforces the idea that strength training plays its own unique role in healthy aging and shouldn’t be treated as secondary to cardio.
According to the University at Buffalo researchers behind the study, every additional 7 kilograms of grip strength was associated with roughly a 12% lower mortality rate. Women who completed chair stands more quickly also saw measurable improvements in longevity outcomes.
Experts say muscle strength is closely tied to mobility, balance, independence, and overall resilience as people age. Simple daily activities like climbing stairs, carrying groceries, or standing up from a chair all rely on maintaining muscular strength over time. Weakness in these areas has previously been linked to higher risks of falls, frailty, cognitive decline, and cardiovascular disease.
The study also highlights how accessible strength testing can be. Grip strength can be measured using a handheld dynamometer, while chair-stand tests can easily be done at home in under a minute. Researchers hope these types of assessments become more widely used as part of preventative health and aging discussions.
The takeaway is simple: building strength may not just help you feel stronger today. It could play a major role in how well and how long you live.