I was just warming up for my quad workout. I was doing light leg extentions to get the blood flowing, when I got off my back was killing me. It's been hurting for a few hours now and won't seem to go away. Most of the pain is centerd in the middle of my back. Anyone have any idea on how to make it go away, and should I just take it easy for the next few days or what?

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Deadlift - 405X1
Squat - 325X1
Bench - 225X1

Golf Tee - Anyone who can bench more than they can squat and/or deadlift.