3 rules that is key to building muscle.
Let me start by saying that there isn't any "right" way of working out, everyone responds to fitness differently and therefore whatever works for him may not work for you, HOWEVER! we are still organism that follow certain rules of science whether we like it or not. When it comes to increasing your muscle mass, your body's skeletal muscles NEED to be placed under a systematic stress of progressive overload. That load does not have to mean more weight, it could also mean more