Moment of human life is inseparable from oxygen, in the case of complete lack of oxygen, human life can only maintain a few minutes, from this point of view, oxygen to sustain life activities, it seems more urgent than food, is more important. Meanwhile, in the metabolic process of the body to produce carbon dioxide and other emissions, the need for timely excreted, it needs to have a strong function of the respiratory system. Regular exercise can help improve and enhance the function of the respiratory system.
(A) to strengthen the function of the respiratory muscles.
Human spine, sternum and ribs constitute the thorax, two lobe of the lung in the chest. Respiratory muscles are mainly intercostal muscles and diaphragm. Respiration during exercise due to enhanced respiratory muscles gradually developed and become powerful. Bust increases, increasing the amplitude of respiratory motion. Inhale at the role of the respiratory muscles, with the expansion of the chest and lungs to expand, increasing the inhaled air. Expiratory muscle contraction can be exhaled more carbon dioxide. Improve respiratory muscle function, making breathing fatigue can work for a long time. Effects of exercise on the respiratory muscles can be seen from the difference between breathing changes, the average person is only 5 to 8 cm, while the athletes up to 9 to 16 cm.

(B) increase lung capacity.
People make the most of all call upon deep breathing air exhaled air for complete lung capacity. General from 2500 to 4000 ml adults, who often engage in long-distance running exercise up to 4500 to 6500 ml or more. FVC regular exercise is also greater than the general adolescent boy. This is mainly because the child is a teenager and hundreds of millions of lung cells maturing period of rapid development, physical exercise can fully open the alveoli, which is to maintain the growth and development of alveoli and flexibility are very useful.
(C) the frequency of slow and quiet breathing deep breathing deepened.
Adult breaths per minute to about 14 to 16 times, people who exercise regularly breathe deep and slow, about 8 to 12 times per minute, which is mainly due to respiratory muscle exerciser large after each breath of air into the lungs more in the unit requires less time to meet the needs of respiratory oxygen exchange, so the respiratory muscles get to rest a long time.
(D) the ability to increase the negative oxygen debt.
When people need to consume a lot of oxygen during strenuous exercise, but if the maximum oxygen uptake of oxygen the body can not meet the need of human movement, a part of the energy supply is only achieved through anaerobic glycolysis, which formed oxygen debt. Oxygen debt must be repaid after exercise, which is the movement after rapid panting reasons. Most people maximum oxygen debt does not exceed 5 to 7 liters, the athletes are up to 20 liters. Muscle soreness after exercise, that is, the absence of oxygen, glycolysis generated a lot of lactic acid in the body caused by accumulation. Further decomposed by oxygen must be eliminated after the motion stops. Those who do not exercise because of poor respiratory function, the ability to slightly negative oxygen debt, is more than a sport to asthma, whole body muscle soreness. The exercise not only well-established people exercise longer and tolerance to acidic substances stronger after the elimination of fatigue is also fast.