“Only about 16% of people in the U.S. participated in sports and exercise activities on an average day in recent years, about a fifth of the number who watch TV on an average day, according a Labor Department spotlight based on the American Time Use Survey. Almost 75% of people who engaged in a sports and exercise activity on an average day in 2003-06 did so for less than two hours. However, the amount of time varies considerably by the type of activity. ‘Those who used cardiovascular exercise equipment, did aerobics, ran, lifted weights, walked, or did yoga spent the least time exercising,’ the Labor Department said. ‘Those who danced, played baseball or softball, bowled, played football, hiked or golfed spent the most time doing sports activities.’”
http://blogs.wsj.com/economics/2008/06/18/less-than-a-fifth-of-americans-exercise-on-average-day/
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