Plyometrics is no joke! For anyone watching this, especially you fellas that think it's some easy Jane-Fonda work out, think again. I used to do the plometrics routine from the P90X videos and it was by far the most difficult of the bunch. When the day for plyo came around I was both horrified and excited. Excited because I knew that once I completed it I would be proud of myself and much fitter for it.