I am trying to bulk up. The past 35 days i have been lifting with maybe 3-4 days that i took off because of a sore back muscle. My training split is day 1 chest, day 2 back, day 3 arms and shoulders, then day 4 legs and then i start over again. My workouts last about 1.5-2 hours long. Everywhere i read says that working out everyday would lead to overtraining but i have experienced the biggest change, in a positive way, in my physique than ever before. Should i continue doing this or take a more conventionally route by doing a chest/tri, back/bi, rest, legs, shoulders and abs, rest apporach?