I have read you should not train the day after you work a large muscle group. Is this really valid? I believe it to be. For example, I trained legs yesterday (Tuesday). Now I won't lift today (Wednesday). Shouldn't you give your body enough time to recover from the workout you just performed? The thing is I see people in the gym lifting everyday. I see their workouts. Chest, Legs, Back, Arms, back to back. Mon- thurs. I see big dudes doing this all the time.