I am always harping about hydration. In fact, 2011, if it had a theme, was hydrate. One of my goals for people in pain, is to bring hydration levels up. Dehydrated tissue carries inflammation more and in my experience more prone to adhesion's from repetitive activity.
I recently came across a STUDY, that showed that when you lift weights in a dehydrated state, the catabolic hormones cortisol and noradrenaline go up and ability to do work goes down. Testosterone levels are also lower. Catabolic hormones break down tissue, usually anabolic (build up) hormones are the result of weight lifting.
So you break down tissue and can't do as much work in a dehydrated state. DRINK UP!