Plyometrics--What are they?

Plyometrics are forceful powerful movements that help to develop speed and agility, usually  for the purpose of improving sports performance.  It improves strength, muscle elasticity, and innervation, which basically means you are stronger and faster, with better recovery.  They do have a place in the average workout, on a basic level.  Because they stimulate the type 2b muscle fibers, they will cause hypertrophy (muscle growth), and increase your overall fitness level, especially when used in an interval-type format.