I recently added plyometrics to my leg days in order to increase my vertical leap. It consists of two leg days a week with two exercises involving heavy weight and 4-5 exercises of plyometrics. The first day i start with plyo and move through to weights last. On the second day i start with weights and leave the plyometrics untiil last. I have been at it for two weeks now (4 sessions total) and have literally added 4 inches to my vert. I have my doubts that I will keep achieving the results at the rate i am, but it does drive me to try my hardest each session. However, this has me thinking....if i react this well to plyometrics for my legs, are there similar techniques i can use for the upper body?