Aerobic and anaerobic exercises.

Literally, aerobic exercises need oxygen while anaerobic exercises do not. Aerobics can also mean exercises that involve the whole body while anaerobics has to do with just a part of the body. However you view it, aerobics are the ideal exercises that strengthen the heart and the lungs. The relevance of these two vital organs can not be over-emphasized; the lungs are concerned with respiration while the heart co-ordinates circulation.
Breathing exercise is a common ‘interlude’ during physiotherapy sessions. It ensures an adequate supply of oxygen to the body (atmospheric/external respiration), without which cellular/tissue/internal respiration will produce lactic acid (kreb’s cycle) instead of glucose. This lactic acid is responsible for local action (pain). Exercise increases the body’s metabolism, more energy is consequently needed for the exercise to progress smoothly and the process that makes this energy (ATP) available require oxygen, thus breathing exercise.
The circulatory system on the other hand ensures the even distribution of nutrients, oxygen, hormone, etc to all parts of the body. The heart sits at the center of this system, ensuring adequate flow of blood which( in the lungs)trap the oxygen made available by the external part of the respiratory system. Aerobic exercise places a higher demand for oxygen and the compensatory adjustment of the body to balance this strengthens the lungs and the heart. Anaerobic exercise is not useless as it may seem as its usually definite; besides, the body can't function effectively during strenuous exercises without anaerobic respiration. E.gs of aerobics are swimming, jogging, skipping, football, etc while anaerobics are pushups, sit-up, weight-lifting, etc.