i've been weightlifting for a couple years now....ive seen a decent amount of results but not too much, what i mean is that i used to be a big guy, around the age of 14-15 i was about 160 really fat and then i lost alot of weight and got down to 140. and saw that along with loosing weight i lost a lot of muscle, my arms became skinny...so then i started workin out again and am back up to around 150 but my arms still look skinny, gained some muscle but not much. any advice. i just do 40lb curls, 80 bench but mostly do pushups and go at the punching bag. any adivce would be appreciated. and o yea i take whey proetin.