• Takes advantage of the stretch shortening cycle → Uses energy stored
by eccentric muscle contraction (lengthening phase) quickly followed by concentric muscle contraction (shortening phase) to generate high amounts of power.
When you train using only concentric and
eccentric muscle contractions without out pausing at the end range of a movement (exercise) when the desired muscle is fully contracted, your joints don't get strong and stable at the end range of motion.
An eccentric muscle contraction is generated when the fibers of the given muscle lengthen as they lower a load, which is often referred to as the down phase of the movement.
Plyometrics work to develop a stronger and faster muscle contraction, through using
an eccentric muscle contraction, immediately followed by a concentric contraction.
They also state that the goal of plyometric training should be to decrease the time needed between
the eccentric muscle contraction and the «initiation of the overcoming concentric contraction.»
«
Eccentric muscle contraction is more likely to be the culprit because it places a higher load on your muscles.»
The reason that
eccentric muscle contraction (think lowering a dumbbell back down in a biceps curl) is more likely to be the culprit is because it places a higher load on your muscles compared to concentric contraction.
Most bodybuilders and strength athletes understand the benefits of concentric and
eccentric muscle contraction in their training but so many neglect isometrics.