Moderate-intensity aerobic activity (e.g., brisk walking) for 30 minutes or longer at least five times per week, or vigorous-intensity aerobic activity (e.g., jogging) for 20 minutes or longer at least three days per week
	Moderate and vigorous-intensity activity is complementary
	Combinations of different activities can produce health benefits
	Shorter bouts of activity (for at least 10 minutes) may contribute to daily total
Use METs to calculate the total activity value
A comprehensive list of MET values are available at http://prevention.sph.sc.edu/tools/compendium.htm
Healthy adults should expend from 450 to 750 MET.min per week
Resistance or weight training using the major muscle groups is recommended at least two times per week on nonconsecutive days
These activities are in addition to the routine activities of daily living
There is a dose-response effect: exceeding the minimum requirements further reduces the risk of inactivity-related chronic illness