People always ask me how I built my chest so large without drugs. It all comes down to training. As a natural, weighted stretch is essential in building a physique. As a novice or mid intermediate, you can get away with this low weight high rep methodology but it won't last forever. Climbing the ladder, you will have to push yourself to go heavier to build more muscle. There is a difference between heavy training and ego lifting. Make sure you are lifting weight you can control, in your realistic range of strength and without comprising form. Once you're injured, there's no turning back time.