Define the term:aerobic fitness

its the measure of your body's ability to take oxygen from the atmosphere and use it to produce energy for your muscle cells.

Explanation:

Aerobic exercise is physical exercise of low to high intensity that depends primarily on the aerobic energy-generating process. "Aerobic" means "relating to, involving, or requiring free oxygen", and refers to the use of oxygen to adequately meet energy demands during exercise via aerobic metabolism.