Not Enough!
On average, Americans spend only about 2 hours each week participating in sports and fitness activities. The CDC recommends adults aged 18-64 get about four hours of physical activity each week by exercising moderately (ex: brisk walk) for 2.5 hours per week and engaging in a vigorous activity, such as running and muscle strengthening, for 1.5 hours per week.
American Time Use Study, May 2012