you're 5'9" and 138? How long have you been training? You should train naturally first. When you start threads like this, you should post your history as far as training, things like this help us give you an good responce.
I have been weight training for 3years. Have been getting lazy recently and its been about 2 months since I went to the gym. Sigh, 138 pounds is so skinny.
Couldn't agree more. Bro seriously, what's your diet like...tell us exactly what your workout regiment is like...everything. We're not gonna flame, we're gonna help. Help us help you lol