Quote Originally Posted by Statius View Post
Working out when sore. What say you? I'm working out hard enough that I'm consistently sore the day after. But I've found that if I work out the same muscles again that next day, sore as I am, I can still perform pretty well. Am I not working hard enough? (but I would think the soreness is a sign of successful working out, no?) Anyhoo, how important is rest for muscle growth? Can you harm growth with too much of a good thing?

Correct food and rest are as important as good training. Constantly training the same muscles each day will result in overtraining.
Training breaks down muscle tissue, growth results from the repair process which also brings increases in strength. Failing to allow the muscles to repair themselves will only take you backwards.