Brother 180. 120 is thin. It's no use not dieting. You are not fat. I just want him to gain weight. The best way is abdominal muscle training. Sit-ups Lift your legs. I recommend that you watch 6 packs of abdominal muscles for 8 minutes. Now you mainly train other muscle groups. The overall dimension is not obvious when it comes to the stomach. Aerobic exercise is done occasionally.

1 Intermediate bundle of anterior and posterior shoulder bundles

2 upper chest, lower chest and middle chest.

3 Back, upper, lower and middle parts

4-arm, double-headed and triple-headed forearm

Five legs, quadriceps femoris, biceps femoris, that is, there are calves before and after.

Specific training methods can be found in the information. You can't learn much from what I said. I don't think you should find any training plan.

It is best to look at the training methods and experience of each part, because you may not have other people's plans, such as me.

1 chest, three heads and abdomen

Double head back

Three-legged forearm abdomen

Four boxes and three heads

Five backs, two heads and abdomen

6 shoulders and forearm abdomen because the training of chest and back involves shoulders.

7 Rest arm muscles recovered a piece of abdominal numbness.