Hi i workout every 3 days doing biceps,triceps,and pectorals mainly. I've been doing this for 2months and have seen results but all of a sudden now when i workout i don't see anymore changes. I'm really soar everytime i workout but i don't c a difference. I read somewhere that body will reach a certain plateau and will stop growing.
Biceps(hammer curls while sitting down) 4sets-8
Pecs(bench press) 4sets-8
Triceps(close grip bench press) 4sets-8
Any tips? Plus upper body is kinda bigger than lower body

so i was wondering what would be the best leg excercises to gain lotsa muscle mass there and how many reps?
thnx alot.