How to Build Muscle (Fast) Increase Your Training Volume. ... Focus on the Eccentric Phase. ... Decrease Between-Set Rest Intervals. ... To Grow Muscle, Eat More Protein. ... Focus on Calorie Surpluses, Not Deficits. ... Snack on Casein Before Bed. ... Get More Sleep. ... Try Supplementing With Creatine ... More items... Sep 23, 2019