I've just recently started on a training routine to gain muscle mass, and I need some advice on it. I'm 14, weight 110, and I'm abut 5'7. Here's my routine:
Monday-Leg press, 10 reps, 3 sets. Lat pull down, 10 reps, 3 sets.
Bench press, 10 reps, 3 sets. Butterfly, 10 reps, 3 sets. Weighted...