The National Physical Activity Guidelines provide minimum levels of physical activity required for health and bodyweight. For adults, the guidelines recommend at least 30 minutes of moderate physical activity on most days of the week. The FITT principle outlines the frequency, intensity, time and type of activity recommended. Older adults should include activities for fitness, strength, balance and flexibility every day. Children and youth should aim for at least 60 minutes of moderate to vigorous physical activity daily. Overweight and obese adults should accumulate 60 minutes of low to moderate aerobic activity each day.