Study Links Greater Muscle Strength to Lower Mortality Risk in Older Women
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A new study finds that greater muscle strength is strongly associated with a lower risk of death in older women. The link held true regardless of body size or whether participants met standard physical activity guidelines. The findings suggest strength itself may be a key, independent factor for longevity.
Facts First
- Greater grip strength was linked to a lower mortality risk, with each additional 7 kilograms associated with a 12% average reduction.
- Faster chair stand performance was also linked to lower mortality, with a 6-second improvement tied to a 4% lower risk.
- The association remained after adjusting for physical activity, sedentary time, and other health markers, indicating strength is an independent factor.
- Body size did not explain the relationship, as lower mortality persisted when strength was scaled to body weight and lean mass.
- The benefit was seen even in women not meeting aerobic activity guidelines, suggesting strength training's distinct value.
What Happened
A study published in JAMA Network Open tracked more than 5,000 women aged 63 to 99 for eight years. The research team found consistent, significant associations between higher strength measures and lower mortality risk, even after accounting for physical activity levels, sedentary behavior, gait speed, and inflammation.
Why this Matters to You
If you or an older woman in your life is focused on health, this study suggests that building and maintaining muscle strength could be as important as aerobic activity for longevity. The findings indicate that strength training may offer protective benefits even for those who are less active in other ways. This could shift health advice to more explicitly prioritize resistance exercises alongside traditional recommendations for walking or cardio.
What's Next
The research, led by University at Buffalo's Michael LaMonte, PhD, adds to evidence supporting the importance of muscular fitness for healthy aging. Future public health guidelines may need to more strongly emphasize strength training. Further research is likely to explore optimal strength-building routines and how to effectively integrate them into health programs for older adults.