Running.
D000328:Adult; D000368:Aged; D001835:Body Weight; D006321:Heart / Q000502:physiology / Q000503:physiopathology; D006801:Humans; D008168:Lung / Q000502:physiology / Q000503:physiopathology; D008875:Middle Aged; D010809:Physical Fitness; D012420:Running; D014481:United States