I've been doing upper body workouts twice a week. These workouts take about two hours. I'd LOVE to shorten them to an hour . But I cant help but think about overtraining a muscle. On the www.exrx.com page, there are a whole list of exercises that i go by. There they list the target muscle as well as the synergist and the stabilizer. I feel that I have to do my whole upper body at once because most exercise include alot more muscles than the target. For example, lets say that I were to do chest and shoulders on monday and back and arms on tuesday. The lever chest press that I would do on monday would target the pectoralis but alsio would work the synergist triceps. On tuesday, I'd work the triceps with the arm workout. My question here is would that overtrain muscle by doing them four times a week? I'm a bit confused and I'm still looking for the best way to workout with out burnout. Thank God for this forum!