Hell, I guess there's no reason not to if you have the time. What do you eat/take before lifting? For me having some carbs and caffiene makes all the difference in the world. I hit a wall really quickly if I don't have either right before I go at it.
Just a thought.
Raw gym PR's, soon to be broken-
Squat- 435 (405x3)
Bench- 345 (315x2)