Objective-To issue a recommendation on the types and amounts of physical activity needed
to improve and maintain health in older adults. Participants-A panel of scientists with …

Purpose The purpose was to describe current levels of physical activity and inactivity among
adults and young people in the United States. Methods Estimates of participation in regular …

Purpose This study describes the types and frequencies of musculoskeletal injuries among
a cohort of adults with above average activity levels who were enrolled in the Aerobics …

To help public health practitioners promote physical activities with a low risk of injury, this
study determined the relation among type and duration of physical activity, cardiorespiratory …

Study Objectives: To determine the associations between deployment in support of the wars
in Iraq and Afghanistan and sleep quantity and quality. Design: Longitudinal cohort study …

BACKGROUND: The relationship between physical activity (PA) and the development of hip/knee
osteoarthritis (OA) has not been clearly defined. The purpose of this study was to …

… Macera et al. reported that among runners with a history of a lower extremity injury in the
12 months prior to a road race, the risk of subsequent injury in the month after the race was …

… Pate RR, Macera CA. Risks of exercising: musculoskeletal injuries. In: Bouchard C,
Shephard RJ, Stephens T, eds. … Macera CA, Pate RR, Powell KE, et al. Predicting lower-extremity …

Purpose: The purpose of this study was to investigate the gender-specific longitudinal
association between quadriceps strength and self-reported, physician-diagnosed hip or knee …

Background: An emerging trend in the field of gerontology is the recognition that older adults,
especially the frail elderly population, can increase their levels of strength and thus …