Journal of the American Geriatrics Society · 2000 · 660 citations · 22 references
Mobility impairments predicted mortality and dependence. However, among people with impaired mobility, physical activity was associated with lower risks, whereas the risk did not differ according to activity level among those with intact mobility. Despite of their overall greater risk, mobility-impaired people may be able to prevent further disability and mortality by physical exercise.
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Physical Fitness and All-Cause Mortality
Steven N. Blair · JAMA · 1989 · 2.6K citations
Effects of Walking on Mortality among Nonsmoking Retired Men
Amy Hakim, Helen Petrovitch, Cecil M. Burchfiel et al. · New England Journal of Medicine · 1998 · 555 citations · Full text