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.
Summary. 1  Aerobic and anaerobic are adjectives used in reference to organisms, cellular respiration and physical exercises. 2  Aerobic pertains to ârequiring airâ, while anaerobic means âwithout airâ. 3  Aerobic organisms can live and grow in the presence of oxygen, while anaerobic ones donât necessarily require it to survive. Aerobic respiration uses oxygen as the final electron acceptor in the generation of energy in the form of ATP. 2  In anaerobic respiration, an inorganic acceptor such as sulfur is utilized. 3  Aerobic metabolism is 19 times more efficient than anaerobic.