When we think about what predicts a long, healthy life, we often focus on diet, sleep, or cardiovascular fitness. But a major new study published in JAMA Network Open in early 2026 — and spotlighted in an editorial in JAMA on April 7, 2026 — places muscular strength firmly at the center of longevity science, particularly for older women.
The research, tracking more than 5,400 women over nearly a decade, found that those with the greatest muscular strength had up to 37% lower risk of dying during the study period compared to the weakest group. Strikingly, this protective effect held even after accounting for physical activity levels, sedentary time, walking speed, and markers of systemic inflammation.
What the Study Found
Published in JAMA Network Open (February 2026; doi: 10.1001/jamanetworkopen.2025.59367), the study analyzed data from the Objective Physical Activity and Cardiovascular Health (OPACH) cohort — a prospective study of 5,472 ambulatory women aged 63 to 99 years, followed for a mean of 8.4 years. The cohort was notably diverse: approximately 34% Black, 17% Hispanic or Latina, and 50% White women, making the findings broadly representative.
Researchers measured two markers of muscular strength:
- Dominant hand grip strength (in kilograms), divided into four quartiles
- Chair stand speed — the time in seconds to complete five unassisted sit-to-stand movements
Compared to women in the lowest strength quartile, those with the greatest strength showed striking differences in survival:
- Women with the highest grip strength (above 24 kg) had a 33% lower mortality risk (hazard ratio: 0.67; 95% CI: 0.58–0.78)
- Women who completed five chair stands the fastest (in 11.1 seconds or less) had a 37% lower mortality risk (hazard ratio: 0.63; 95% CI: 0.54–0.73)
Even after researchers simultaneously controlled for moderate-to-vigorous physical activity and sedentary time — factors often assumed to explain the relationship — the protective effect of strength remained statistically significant. The same pattern held after adjusting for C-reactive protein, a biomarker of systemic inflammation.
“These findings suggest that assessing strength and promoting its maintenance are instrumental for optimal aging,” the study authors concluded.
Why Grip Strength Is More Than Hand Fitness
Grip strength has long served in geriatric medicine as a proxy for whole-body muscular health. Research published in Age and Ageing (2022; PMID: 35639798), drawing on data from 28 countries, found that lower handgrip strength was associated with higher all-cause and cancer mortality in older adults. A separate longitudinal study in Experimental Gerontology (2022; PMID: 36096322) found similar associations with cardiovascular mortality.
This convergence of evidence suggests grip strength reflects the overall integrity of the musculoskeletal system — and by extension, the body’s capacity to manage metabolic stress, recover from illness, and resist age-related decline. It is also easy to measure in a clinical setting, requiring nothing more than a handheld dynamometer and a few seconds.
The Sarcopenia Problem: Muscle Loss With Age
Muscle loss with aging — clinically known as sarcopenia — is one of the most underrecognized health challenges in older adults. After age 30, most people lose approximately 3–8% of muscle mass per decade, a rate that accelerates after age 60. For women, the decline can be especially pronounced following menopause, when falling estrogen levels alter muscle protein synthesis and contribute to changes in body composition.
Sarcopenia is associated with increased fall risk, bone fractures, hospitalization, and loss of functional independence. A 2024 prospective cohort study drawing on data from 28 countries, published in the Journal of Cachexia, Sarcopenia and Muscle (PMID: 39439054), found that lower muscle strength predicted higher all-cause mortality even in the oldest old — those aged 80 and above.
The 2026 JAMA research reinforces that sarcopenia is not an inevitable fate — and that strength assessment and maintenance may be among the most impactful preventive tools available for older women.
What Types of Exercise Build Strength in Older Women?
Current guidelines from the World Health Organization (WHO) recommend that older adults engage in muscle-strengthening activities involving major muscle groups on at least two days per week, alongside regular aerobic activity. The U.S. Physical Activity Guidelines for Americans echo this recommendation.
Studies indicate that several exercise modalities are particularly effective for building and maintaining strength in older women:
Resistance Training
Weightlifting, resistance band exercises, and bodyweight movements such as squats, lunges, and modified push-ups have been shown in clinical trials to increase grip strength, lower-body strength, and lean muscle mass in older adults. Research suggests that even low-to-moderate intensity resistance training performed twice per week can produce measurable strength gains within eight to twelve weeks.
Chair-Based Exercises
For women with limited mobility or balance concerns, seated leg lifts, calf raises, and sit-to-stand exercises directly target the quadriceps and hip flexors — the same muscle groups assessed in the JAMA chair stand test. Studies suggest these exercises can be safely performed at home with minimal or no equipment, making them highly accessible.
Functional Movement and Mind-Body Practices
Tai chi, yoga, and Pilates have been shown to improve neuromuscular coordination and lower-body strength while also reducing fall risk — a critical secondary outcome of muscle weakness in older adults. Research on tai chi in older women shows improvements in balance, leg strength, and self-reported quality of life.
Nutrition’s Role in Muscle Preservation
Exercise alone is not sufficient for maintaining muscle mass. Nutrition plays a critical supporting role. Research published in the Journal of Gerontology (2023; PMID: 37325954) suggests that older adults may need higher protein intake than general population guidelines recommend — approximately 1.0 to 1.2 grams of protein per kilogram of body weight per day — especially when combined with resistance training.
Leucine, a branched-chain amino acid found in eggs, dairy products, legumes, and lean meats, is particularly effective at stimulating muscle protein synthesis. Foods such as Greek yogurt, cottage cheese, lentils, and grilled chicken are commonly cited in nutritional gerontology research as important components of a muscle-supportive diet.
Clinical Implications: Strength as a Vital Sign
The JAMA editorial accompanying the 2026 study called for wider clinical adoption of simple strength assessments — including grip dynamometry and timed chair stands — as routine components of health evaluations for older women. These inexpensive, low-tech tests can identify women at elevated mortality risk years before other warning signs emerge, creating a meaningful window for preventive intervention.
Importantly, the OPACH study found that the associations between strength and mortality held consistently across diverse racial and ethnic groups, a range of age categories (63 to 99 years), and varying levels of BMI and physical activity — suggesting the findings apply broadly rather than to a narrow demographic.
Healthcare providers increasingly view muscle strength as a vital sign in its own right — as clinically meaningful as blood pressure, blood glucose, or body weight. As geriatric medicine integrates these tools into standard practice, the hope is that more older women can be identified early and supported in maintaining the strength that research increasingly shows underpins a longer life.
Key Takeaways
- Older women with greater muscular strength have significantly lower all-cause mortality, independent of physical activity or sedentary behavior
- Both grip strength and lower-body strength (measured by chair stands) independently predict survival
- Resistance training — even at low-to-moderate intensity — can meaningfully improve strength within weeks
- Adequate protein intake (approximately 1.0–1.2 g/kg/day) supports muscle preservation alongside exercise
- Simple clinical strength tests may help identify older women at elevated mortality risk long before other symptoms appear
As the science of aging advances, muscular strength is emerging as one of the most actionable and measurable predictors of longevity. Consulting a healthcare provider or certified fitness professional is the best first step toward building a personalized, safe strength program.
Disclosure: This content is for informational purposes only and is not medical advice. Always consult a qualified healthcare provider before making changes to your health regimen.