Further, the question arise how plyometrics add the advantage in speed development?

So, to know that we need to understand plyometrics first. Let's talk about science behind plyometrics.

Phase 1 - Eccentric (Loading) Phase

This is the pre-stretch phase of the muscle, used for force reduction and deceleration. Knee and ankle stiffness are important for effective force absorption. In this phase when  muscle spindle of the muscle tendons and non-contractile tissues within the cell is stretched you can store potential energy in its elastic elements. 

Phase 2 - Amortisation Phase

It is a time between the end of the 1st phase i.e eccentric phase (downward force) and the concentric phase (upward force)

Phase 3 - Concentric Phase 

The shortening of the muscle where the muscle contracts and produces force.

This phase is assisted by the stored elastic potential energy form the stretch- shortening cycle.

For an example you have seen catapult (Gulale) so when we stretch that the catapult absorb force within that rubber. after releasing it the rubber elastic mechanics throw that stone by using the elastic elements within the rubber. So, same like this mechanism our muscle works firstly it store energy and after that we release it .

Now if you learn the correct way of absorption of energy efficiently you can use it very effectively and strongly. Plyometrics is the best way to learn that mechanics with some explosive and reactive strengthen exercises.

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