JPATS5, Now things could have changed since I did my research in plyometrics. But, they should not be done 3 days a week for an hour a day. Plyos put a huge amount of stress on the nervous system. It takes awhile for the muscles to recover. Plyos should be done 1 day a week and maybe 2 if you are already in great shape. If done correctly they will not help much with strength. A workout should be limited to 150-200 jumps (of various types) per workout. Now as I said it has been a number of years since I did my Thesis on the subject. But I still use this workout schedule today. With great results. Where did I get my info from. A guy named Michael Yessis.