Weight lifting question, I recently injured my mid lower back (feels like a knif!

Question:
It happened when I was doing an "arnold shoulder press", light weights just warming up, sitting on a straight back bench. I have done this excersise many times and never had a problem. Should this excersise be done with a slightly declined bench and not a stright up and down one to avoid injury? Also anyone have a very detailed web site with pitchures and discriptions on all the weight lifting excersises? thanx:)
Answers:
Try www.ast-ss.com

They offer descriptions, with pics for different exercises.

Go see a chiropractor. You have a subluxation. I've had the same exact injury.
Answers:

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