Plyometrics is the training of the eccentric muscles.
Now for the English translation.
When you are doing a high impact motion, like jumping, there are two phases to the muscular activity. The first (concentric, I believe) executes the motion, the second (eccentric) deals with the left overs, basically. So, when you do a vertical jump, the muscles in your legs exert force to make you leap upwards. When you're coming back down, the same muscles contract in a different way to stop your body from continuing downward into the floor.
An example of a plyometric exercise is as common place as sprinting or as exotic as box jumping. There are different uses for the boxes in plyometrics, but a typical exercise is standing on one box, stepping off to the floor and immediately jumping to the next box so that as soon as your muscles go eccentric, they go concentric.
The results are that you are better able to transition from one muscular phase to another, can quickly execute a number of explosive motions with little to no detriment to your output and an overall greater release of power (force per time). |