Grip Strength Predicts Longevity in Women
A new JAMA Network Open study found that grip strength was closely linked to survival odds in women aged 63 to 99, regardless of their activity levels or fitness measures. The research reinforces that muscle strength itself is a powerful, independent predictor of longevity for older adults. This adds to growing evidence that resistance training remains one of the most evidence-based strategies for long-term health.
- Grip strength is a strong predictor of all-cause mortality; one meta-analysis of 42 studies found that people with low grip strength had a 67% higher risk of early death from all causes. - The JAMA study found that for every one standard deviation increase in grip strength, there was a 12% reduction in mortality risk for women aged 63 to 99. In more concrete terms, a 7-kilogram increase in grip strength was correlated with a 12% lower mortality rate. - Grip strength serves as a proxy for overall muscle mass and function, which are crucial for metabolic health, mobility, and resilience to illness. A decline in grip strength can indicate underlying issues like sarcopenia (muscle loss) and reduced neuromuscular function. - For women aged 60 and over, a grip strength of 18-28 kg (40-62 lbs) is considered within the normal range. Grip strength for women generally peaks between the ages of 30 and 39. - The study also measured lower body strength by timing how long it took participants to complete five unassisted chair stands. Women in the fastest group (11.1 seconds or less) were about 34% less likely to die than those in the slowest group (16.7 seconds or more). - Simple exercises to improve grip strength include squeezing a tennis ball, doing farmer's carries (walking with heavy weights in each hand), and performing wrist curls with light dumbbells. - Beyond longevity, strength training for older women helps improve bone density, which can reduce the risk of osteoporosis and fractures. It also improves balance, mobility, and can help manage symptoms of menopause. - The link between grip strength and longevity exists independently of other factors like cardiovascular health and inflammation, which were accounted for in the University at Buffalo-led study.
