Planning a first-time trip to the Phoenix area and would like advice about the best time to visit with regard to the weather. I want to enjoy sitting by the pool, swimming, etc, as well as do some hiking and typical tourist things. However, I would prefer to avoid the extreme heat. Hide.
Medical Definition of aerobics. 1  1singular or plural in construction : a system of physical conditioning involving exercises (as running, walking, swimming, or calisthenics) strenuously performed so as to cause marked temporary increase in respiration and heart rate. 2  2: aerobic exercises.
The American College of Sports Medicine (ACSM) defines aerobic exercise as any activity that uses large muscle groups, can be maintained continuously, and is rhythmic in nature.. It is a type of exercise that overloads the heart and lungs and causes them to work harder than at rest.