Aerobic zone: when you are exercising at an intensity where your heart rate raises to 60-85% of maximum heart rate. Calculated by multiplying maximum heart rate by 0. 6 and 0. 85. Max heart rate depends on age and can be estimated by subtracting your age from 220. Aerobic exercise: endurance exercise that increases heart rate and uses oxygen to provide energy as atp. Aerobic capacity: maximum amount of oxygen that can be consumed by the tissues during exercise. Also called maximal oxygen consumption or vo2 max. Aging: the inevitable accumulation of changes associated with and responsible for an ever- increasing susceptibility to disease and death. Alcoholic hepatitis: inflammation of the liver caused by alcohol consumption. Alzheimer"s disease: a disease that results in a relentless and irreversible loss of mental function. Anabolic steroids: synthetic fat-soluble hormones that mimic testosterone and are used to increase muscle strength and mass.