Aerobics refer to a variety of exercises that stimulate heart and lung activity for a time period sufficiently long to produce beneficial changes in the body. Running, swimming, cycling, and jogging – these are typical aerobic exercises. There are many others.
Aerobics offers you an ample choice of different forms of exercise, including many popular sports. They have one thing in common: by making you work hard, they demand plenty of oxygen. That’s the basic idea. That’s what makes them aerobic.
The main objective of an aerobic exercise program is to increase the maximum amount of oxygen that the body can process within a given time. This is called your aerobic capacity. It is dependent upon an ability to 1) rapidly breathe large amounts of air 2) forcefully deliver large volumes of blood and 3) effectively deliver oxygen to all parts of the body. In short: it depends upon efficient lungs, a powerful heart, and a good vascular system. Because it reflects the conditions of these vital organs, the aerobic capacity is the best index of overall physical fitness.