To start off you have to give it everything you got right when you get in the gym.  This is a trick that helped me change my body in a very short amount of time while still eating everything that I wanted, in moderation of course.  You instantly subject your body to fatigue and through that your body will adapt and it will change very quickly.  Your body is extremely good at adapting as long as you put the right kinds of stress it can heal from.  Your body always heals because its main purpose is to reproduce and survive and to get the most out of this we do HIIT training. Push through for those first 30 minutes in the gym and fatigue the hell out of your body, but like always train hard and smart as well and listen to what your body is telling you and take every precaution to keep yourself safe from injury. Now go transform that body into the body you’ve always wanted.