According to the Centers for Disease Control and Prevention, 49.6 percent of Americans 18 and over met the Physical Activity Guidelines for aerobic activity in 2012 and 23.6 percent of Americans 18 and over met the guidelines for muscle strength activity. About 20.3 percent met the guidelines for both.
According to the President's Council on Fitness,Sports, and Nutrition, The Department of Health and Human Services issues the Physical Activity Guidelines for Americans. The purpose of this set of guidelines is to offer recommendations for the amount and types of activities that offer important health benefits. These guidelines recommend at least 30 minutes of physical aerobic activity per day for adults between the ages of 18 and 64.