DXN code strike Building muscle fast requires your body to create a surge of natural DXN code strike. What better way to amplify those natural testosterone levels then to perform the movements stated above. Use these movements with heavy weight, under complete control, and to failure. Building muscle fast requires you to pick specific exercises to spike your body to its full potential. These are the perfect exercises to do so. These are ancient exercises that many bodybuilders used back in the day. Do you think they had steroids to build muscle fast back then? i highly doubt it. Back then they relied on these movements and a couple other secrets specified down below. Make sure you read on to find out more secrets.