​Identify some of the American College of Sports Medicine's (ACSM) recommendations for amounts and types of physical activity (PA) relative to different health goals.

​More recent research has identified lower amounts and types of PA for achieving desired health benefits.
The ACSM revised its recommendations in 2011 to reflect these findings.
Healthy adults under age 65 should engage in moderately vigorous activity for 30 minutes five times a week,
or vigorous activity for 20 minutes three times a week,
and 8-10 sets of 12 repetitions each of strength training exercises at least twice a week.
Experts identify this level of exercise as sufficient for protection against cardiovascular and other chronic disease.
Moderate exercise (e.g. walking) provides health benefits; vigorous exercise is unnecessary.
Moderate exercise may be better for some cardiovascular risk factors than more intense exercise.
Weight loss or its maintenance cannot be attained through the recommendations above.
To lose weight or maintain weight loss, the intensity and duration of exercise must be greater than those recommended for health benefits alone.
Hence the specific health goals involved dictate how much exercise is enough.
​