I always hear about the benefits of moderate exercise, but what does "moderate" mean, exactly?
D002318:Cardiovascular Diseases / Q000517:prevention & control; D015444:Exercise; D015438:Health Behavior; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D010807:Physical Endurance / Q000502:physiology*; D010809:Physical Fitness / Q000502:physiology*; D012648:Self Care