i have a very weak chest and i really want to balance out my body's proportions by next summer.. im wondering if training my chest three times a week would be harmful and/or wasteful in terms of building muscle and filling out my chest.. i would not be on any gear because of my age(20), but would be eating clean and doing cardio.. and i do not mean training chest 3 times a week forever i just mean until i see that its coming back into proportion and then start scaling it back to two times a week then back to one or two times a week to maintain..