physical activity

Physical activity doesn't have to be strenuous to produce results. Even moderate exercise five to six times a week can lead to lasting health benefits.

When incorporating more physical activity into your life, remember three simple guidelines:

1. Exercise at moderate intensity for at least 2 hours and 30 minutes spread over the course of each week.
2. Avoid periods of inactivity; some exercise at any level of intensity is better than none.
3. At least twice a week, supplement aerobic exercise (cardio) with weight-bearing activities that strengthen all major muscle groups.

http://www.everydayhealth.com/fitness/basics/get-fit-for-life.aspx