The theoretical cornerstone of all plyometric exercises – the principle of overload recovery The reason why human muscle strength can gradually improve after reasonable training is that the “principle of overload recovery” is at work. All current plyometric exercises can be said to be derived from this theoretical cornerstone. 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 experience a moderate degree of fatigue and decline in form and function, among other things. Through appropriate rest, the 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”. It is easier to understand if we use a graph: From the above graph, we can clearly see that after the start of the plyometric exercise, we will gradually decline in muscle function and morphological indicators because of fatigue; fatigue to a certain extent, it can not be practiced, we must rest, but after rest this decline will continue for a period of time (this we all have experience, not immediately after stopping exercise In the process of rest, muscle function and morphological indicators will gradually rebound, gradually approaching the original level; after a period of rest, 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, this rebound wave phase, is the “excess recovery “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: look at the chart to understand, the second, third, Nth …… 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 the is an increase in muscle volume and muscle strength! There are other possibilities: this is the consequence of not fully recovered before rushing to start the next exercise, the accumulation is not the training effect, but fatigue! The more you practice, the harder you work, the deeper the fatigue, the worse the muscle form and function, which is commonly referred to as “over fatigue” or “over training”!