Animals and humans can adapt to internal and external stimuli. For example, frogs' hind legs are particularly thick, and birds' pectoral muscles are particularly thick. These are all enhanced in long-term life activities, not overnight.
When we do physical exercise, because the activities of various tissues and organs of the human body are more intense than usual, the energy consumed is greatly increased. For example, running 400 meters at a speed of 6 meters per second, the energy consumed by muscles is hundreds of times that of quiet. There is a law in the human body: the energy materials consumed by various tissues and organs during strenuous activities can be compensated and recovered in excess after exercise. In a certain range, the more energy and materials are consumed during exercise, the more obvious this compensation effect is.
Due to the continuous regular movement, this kind of "consumption" and "compensation" has also been going on. Over time, the energy and material reserves in the body increase, thus ensuring that all tissues and organs have sufficient energy and material supply during human activities and improving human activity ability. However, this overcompensation will decline after the movement stops and return to the original level after a period of time. If you don't insist on regular exercise, the compensation and recovery function of energy substances can only stay at a low level. At the same time, with the aging of the human body, it will gradually decline.
In the process of exercise, the improvement of the nutritional status of various tissues and organs promotes the development of their structure and function, and improves the physical quality and health level of human body. At the same time, master various sports skills in sports. Once the exercise is interrupted, the enhancement of the functions of various organs and the mastery of motor skills will gradually disappear. Used to be very skilled and coordinated movements, will become unfamiliar and clumsy.
It turns out that running1500m is very relaxing. After stopping exercise, running again will become asthma, nausea and even vomiting. This shows that due to the interruption of exercise, motor skills and the functions of blood circulation, breathing and other systems will be significantly reduced. Therefore, we should insist on regular exercise. "Three days to fish, two days to dry the net", do it if you are happy, and don't exercise for a long time if you are unhappy, so that your body can't enhance its adaptability through physical exercise. Some even disappear because they can't be consolidated in time, so the exercise effect is not good and you can't effectively enhance your physique.
"Running water does not rot, and family members do not swear." This means that moving objects can resist microbial erosion. Similarly, regular physical exercise can promote the metabolic process, enhance the adaptability of human organs and systems under the influence of physical exercise, improve the resistance to diseases, and achieve the purpose of strengthening physical fitness and improving health.