Plyometric back pain.

Ok I hope i can get use to this workout a little. Plyometrics yesterday was certainly harder and more of a work out then it seems, but if i can not adjust to some of this acheing I might not be able to do this workout. After first finishing the workout I was really soar and could hardly walk. Now my lower back is killing me in pain not the soar kind either. I woke up at 5:30 this morning and had to take two aleve. No matter what position I was sleeping in or how I supported my lower back it would hurt just as much. Well I have a whole week of rest before I have to do that workout again so lets hope my body does adjust.