A large study (2026) in JAMA Network (on 5,472 women aged 63 to 99 years) found that muscle strength was associated with significantly lower mortality risk in women—even for those not meeting guideline-recommended activity levels. The researchers noted that the findings were a surprise, as strength in older women turned out to be a key—and unique—factor in longevity, reducing the risk for early death by a third or more.
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