Originally Posted by Redcapote
You should not be doing full body routines multiple days in a row. You should be giving the body at least 3 or 4 days to recover from an intense full-body session. However long it takes to feel fresh again, let it recover. Legs are merely your largest muscle group, so of course they'll have the most impact. Of course, keep the work out to about 50 minutes or less, because cortisol starts to produce in your body and it destroys your testosterone levels (even for days after the fact).
Not completely true. If you supplement your workouts with vitamin C and glutamine they will help to reduce cortisol by supplying cortisol with blood glutamine. Cortisol will not have to destroy muscle to obtain it.