From the Centers for Disease Control and Prevention. Prevalence of leisure-time and occupational physical activity among employed adults--United States, 1990.
D000328:Adult; D015444:Exercise; D006801:Humans; D007899:Leisure Activities; D005082:Physical Exertion; D015995:Prevalence; D014481:United States / Q000453:epidemiology; D017132:Workplace / Q000706:statistics & numerical data