Describe the physical activity guidelines for adults and older adults.

Adults should engage at least 150 minutes to 300 minutes a week of moderate-intensity, or 75 minutes to 150 minutes a week of vigorous-intensity aerobic physical activity, or an equivalent combination of moderate- and vigorous-intensity aerobic activity. Ideally, aerobic activity should be evenly spaced throughout the week. In addition, adults should do muscle-strengthening activities of moderate or greater intensity and that involve all major muscle groups on 2 or more days a week. Older adults should follow the same guidelines as adults if physically able, but also include balance training and flexibility exercises to prevent falls.