Question: how many reps and sets for weight gain?
Answer: To gain muscle: 3 or more sets of a weight that you can do 6 to 8 reps before you are fatigued. Beginners should work up to this level. To build endurance and health: 1 to 3 sets at a weight that has you fatigued at 12 to 16 reps. Another frequent question is how long you should rest between sets.