Strong Muscles May Help Women Live Longer, Study Finds

Stronger Muscles Linked to Longer Life in Older Women

A new study published in JAMA Network Open suggests that muscular strength could be one of the most important predictors of healthy aging and longevity in older women. Researchers found that women with greater upper- and lower-body strength had a significantly lower risk of death, regardless of how physically active they were overall.  

The study analyzed data from 5,472 ambulatory women between the ages of 63 and 99 who participated in the Women’s Health Initiative and the Objective Physical Activity and Cardiovascular Health in Older Women study. Scientists assessed muscle strength using two simple clinical tests: handgrip strength and chair-stand performance.  

Lojain Mahdy

Senior Physiotherapist

This study reinforces the growing evidence that muscle strength is not only a marker of physical function, but also a strong independent predictor of longevity and healthy aging. Simple clinical measures such as handgrip strength and chair-stand performance may provide valuable insight into overall health status, neuromuscular function, and mortality risk in older women. From a physiotherapy and sports medicine perspective, these findings further highlight the importance of resistance training and strength preservation strategies across all stages of aging, not only to improve mobility and independence, but potentially to enhance long-term survival outcomes as well.

Researchers then followed participants over time while accounting for numerous factors that could influence mortality risk, including age, smoking, body weight, chronic disease burden, physical activity levels, sedentary behavior, walking speed, and inflammation markers. Even after adjusting for these variables, stronger women consistently showed a lower risk of death.  

The findings are particularly important because they suggest muscle strength itself may independently contribute to longevity rather than simply reflecting a healthier lifestyle. Women with stronger grip strength and faster chair-stand times appeared to benefit even if they did not fully meet standard physical activity recommendations.  

Lead author Michael J. LaMonte and colleagues noted that muscle strength is closely tied to functional independence, mobility, balance, and resilience during aging. Loss of muscle strength, often referred to as dynapenia, is a common consequence of aging and may increase vulnerability to falls, hospitalization, and frailty.  

Jordan Gardiner

This is a really important finding, particularly as genetic testing indicates factors related to muscle strength, recovery, and overall women’s health. Research continues to show that muscular strength plays a major role in healthy aging and longevity. Beyond physical performance, maintaining strength supports bone density, lean muscle preservation, joint stability, posture, metabolic health, and long-term independence as women age. These findings reinforce the importance of implementing targeted strength based training to support long-term health and physical function for women.

Importantly, the study relied on practical assessments commonly used in clinical settings. Grip strength testing with a handheld dynamometer and repeated chair stands are inexpensive and easy to perform, making them useful tools for identifying older adults at greater health risk.  

‍  The authors emphasized that maintaining muscular strength through resistance exercise may be an essential part of healthy aging strategies for women. While aerobic exercise remains important for cardiovascular health, the findings add to growing evidence that strength training deserves equal attention in older populations.

Previous research has already linked resistance training to improvements in bone density, metabolic health, mobility, and body composition. Emerging evidence now suggests these benefits may also translate into improved survival and quality of life in advanced age.

Why This Matters for GeneFit Readers

This study highlights the growing importance of muscle health in longevity medicine and preventive healthcare. For GeneFit readers, it reinforces the idea that aging well is not only about losing weight or improving cardiovascular fitness. Preserving muscle strength may be equally critical for maintaining independence, reducing frailty risk, and supporting long-term health.

The findings also align with GeneFit’s broader focus on personalized wellness, body composition analysis, and healthy aging interventions. Strength testing, resistance training programs, nutritional optimization, and metabolic health monitoring could all play an increasingly valuable role in future longevity-focused clinical care.

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Reference

LaMonte, M. J., Hyde, E. T., Nguyen, S., Castro, E., Seguin-Fowler, R. A., Eaton, C. B., Miller, C. R., Di, C., Stefanick, M. L., & LaCroix, A. Z. (2026). Muscular strength and mortality in women aged 63 to 99 years. JAMA Network Open, 9(2), e2559367. https://doi.org/10.1001/jamanetworkopen.2025.59367

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