subject: Top 5 Muscle Building Rules For Skinny Guys [print this page] Go to bed early - Going to bed early is vital to provide your body the time it needs to recuperate. Surprisingly muscle mass is actually built outside the gym, when you're eating or sleeping. When you're in the gym you're actually causing microtrauma to your muscle tissue and by resting you're allowing your body time to build muscle to adapt to the stimulus in the gym. Hormones such as IGF-1 (Insulin-like Growth Factor 1), Melatonin and HGH (Human Growth Hormone) are secreted when you're sleeping and aid in muscle building.
