at risk of sounding like a dirty hippie, your body operates as a holistic whole (we'll leave out the chakras for now), and if all the muscles are strong enough to complement each other then you're sorted. as Sara mentioned, if do more than normal, the muscles that don't specifically contribute will let you down eventually. and why go to gym for this? you can effectively do resistance excercises without going to gym. then you don't have put up with some of the folk that are pumped up like gorillas, old and sour, smelly from last nights party and garlic consumption, no delicate acts required when the soap gets dropped..... Besides overall fitness is a much better state of being than having a great heart and legs, and no upper body strength to complement that.
