Do not let your muscle building exercise go over an hour.Formula 41 Extreme Perform between 5-8 sets of muscle (chest, thighs, back) and between 2-4 sets of muscle building exercise for smaller muscle groups (abs, shoulders, biceps, triceps, calves).Push all sets to the brink of muscular failure and focus on progressing in either reps or weight every 7 days. If you truly train hard and keep a consistent schedule, doing muscle building exercise more often or for a greater amount of time than this will jeopardize your gains.