At most, you need to complete between twenty-five and fifty reps for each body part, roughly two or three times a week to gain the most muscle mass. This is going to be very beneficial to serious lifters. If you strive to do more perfect amino reviews than this, you may be wasting your time because overdoing it can lessen the results that you see. Limit your workouts to no more than 60 minutes. The body begins to produce more cortisol, a stress hormone, after sixty minutes of working out. Cortisol is a hormone which can block testosterone, wasting the effort you exert in your muscle building program. For the best results, only spend 60 minutes or less working out.