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.
Lesson Summary. Aerobic exercise is a type of physical activity that uses your large muscle groups, is rhythmic in nature, and can be sustained for at least 10 minutes. Walking, jogging, indoor cycling, and aerobic dancing are all examples of aerobic exercise that strengthen your heart and lungs and keep you healthy.