title: Evaluation of physical activity.
authors: A D
authors: AD
authors: Webborn
mesh_terms: D000368:Aged; D005069:Evaluation Studies as Topic; D015444:Exercise / Q000502:physiology*; D005260:Female; D015438:Health Behavior; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D013997:Time Factors