Hi, I'm 31, 5'8" and 140 lbs with 13% body fat. I play soccer competitively about 2 times a week (2 hours) and have done it for most of my life and will continue to. I've never been over 155 lbs even when not eating right so I have stronger legs from soccer and want to build some upper body strenght, currently I have no chest and arms. If you looked at me from the side you could draw a straight line from pecs down to my chest. All I want to do move up to 150-155 and build my upper body while still staying lean. Is it possible to stay lean and build some upper body at the same time?