Stronger Women Live Longer
A new study in *JAMA Network Open* tracking thousands of women aged 63-99 found that higher muscular strength correlates with lower mortality risk from all causes. Grip tests and functional assessments were key measures. Strength training isn't just about aesthetics — it's strongly linked to healthy aging and improved life expectancy.
The lead author of the study, Michael J. LaMonte from the University at Buffalo, noted the results were "a bit of a surprise" in how crucial muscular strength is for longevity, independent of aerobic fitness. For every 7 kilograms (about 15.4 pounds) of grip strength, there was a 12% lower mortality rate. This connection isn't limited to one study. A 2024 *Nature* study on nearly 10,000 men and women also linked weak grip strength to a higher risk of early death. The age-related loss of muscle mass and function, known as sarcopenia, is a significant predictor of mortality, with some studies showing it can double the risk. Muscle is a vital metabolic organ, helping to regulate blood sugar and reduce inflammation. Strength training improves insulin sensitivity, lowers blood pressure, and helps build bone density, which is crucial for preventing osteoporosis and fractures. The benefits extend beyond physical health. Resistance training has been shown to improve cognitive function and may slow the loss of cognitive abilities in adults with mild cognitive impairment. This is partly because exercise increases blood flow to the brain and activates signals between nerves and muscles. For optimal health benefits, a combination of exercise is most effective. A study in the *British Journal of Sports Medicine* found that combining one to three hours of aerobic exercise with one to two strength training sessions per week was associated with a 40% lower mortality risk than being sedentary. The U.S. Centers for Disease Control and Prevention (CDC) recommends that adults 65 and older engage in at least two days of muscle-strengthening activities per week. This doesn't necessarily require a gym; exercises using body weight, resistance bands, or even soup cans can be effective. The goal of strength training for older adults is to build and maintain the strength needed for daily activities like climbing stairs, carrying groceries, and getting out of a chair, thereby preserving independence. Even for those who don't meet aerobic exercise guidelines, having higher muscular strength is linked to significantly lower mortality.
