JAMA Network Open
Physical Fitness and All-Cause Mortality in Older Adults
Importance Regular physical activity promotes healthy aging, yet clinical risk stratification in older adults relies largely on comorbidity burden, often overlooking functional capacity. Objective fitness assessment may serve as a clinically relevant indicator of physiological reserve, but evidence from large cohorts evaluating multiple fitness domains remains limited. Objective To evaluate associations between objectively measured physical fitness across multiple domains and all-cause mortality in older adults. De …