Looking to build muscle? This upper lower body split program can help. Building muscle is not a simple task, as many factors such as diet, genetics, and type of training must be considered. A hypertrophy program focuses on increasing muscle size by enlarging muscle fibers. Remember, this program is not for improving strength or power, but strictly for muscle gain. The upper/lower body split includes balanced training days for major muscle groups and isolation-style movements. Try the 20 Rep Squat Program for serious muscle growth. Give the upper lower body split program a chance to see results.