The reason why the human body’s muscle strength can gradually improve after reasonable training is because of the “overload recovery principle” at work. All the current muscle strength exercises can be said to be based on the derivation of this theoretical cornerstone extension. It is no exaggeration to say that without hyper-recovery, there would be no muscle strength growth and the body would not be trainable. What is hyper-recovery? To put it in words: After proper exercise, a muscle or muscle group will suffer a moderate degree of fatigue and a certain degree of decline in form and function, etc. Through appropriate time rest, muscle strength and morphological function can be restored to the pre-exercise level, and within a certain period of time, can continue to rise and exceed the original level. With the extension of rest time, and gradually decline back to the original level of function. If the next exercise is performed in the phase of overload recovery (muscle function rises and exceeds the original level for a period of time), you can keep the overload recovery will not fade, and can gradually accumulate the exercise effect. In this way, through repeated muscle strength exercises can make muscle volume increase and muscle strength increase. This is “overload recovery”. If you use the graph to represent, it may be easier to understand: when the muscle strength exercise began, we because of fatigue, muscle function and morphological indicators will gradually decline; fatigue to a certain extent, it can not practice, must rest, but after rest this decline will continue for a period of time (this we all have experience, not immediately after stopping exercise can not feel tired); in the process of rest, muscle function and morphological indicators will gradually return to The function and morphological indicators will gradually rebound, gradually approaching the original level; after a period of rest, the muscle function and morphological indicators will not only rebound to the original level, will continue to rise above the original level, forming a small wave, the wave of this rebound phase, is the “excess recovery”; if you continue to rest, the If we continue to rest, the excess recovery will slowly subside, and the muscle indicators will return to their original levels. If the timing of our next muscle strength exercise is appropriate, just at the stage of overload recovery: exercises are just at the overload recovery stage of the previous exercise, then the effect of the exercise will gradually accumulate, the muscle function and morphological indicators will gradually improve, we see that the muscle volume increased, muscle strength increased! There are other possibilities: This is the consequence of not fully recovering and rushing to start the next exercise, the accumulation is not the training effect, but fatigue! The more you practice and the harder you work, the deeper the fatigue, the worse the muscle form and function, which is often called “over fatigue” or “over training”! There is also a common possibility: it can be seen, “three days of fish, two days of sunshine” type of exercise, or because the rest is too long, the role of the exercise completely faded, practice for a long time will not have any improvement, at best, to maintain the level of muscle strength does not regress. Of course, there are other cases. For example, a practice is too hard, the fatigue level is too deep to recover; or each exercise is not strong enough to produce any super recovery at all. This is the same accumulation of fatigue and no training effect! By analyzing the theory of super recovery, we can know that the practice of muscle strength is not a problem that can be solved by simply gritting your teeth, suffering, suffering, or just comparing a few strokes, or even lying down to nurture. There must be a scientific training method and reasonable use of the law of “excessive recovery” in order to really improve muscle strength through rehabilitation training.