In one single workout, how exactly is it possible to "overtrain" a muscle group? I always hear people say "Less is more" and they speak of "negative gains." It's my understanding that once a muscle is broken down from training it, you can't break it down any more. How could working the muscle after it's fully exhausted create a negative gain? Obviously, I understand the concept of resting your muscles for several days after working it, but I am asking about one single workout (say, your chest). Does my question make sense? Any thoughts?





