I'll list off the things that are probably needed, well, I am 16 years old, I'm 5'10 in height, I weigh 137 pounds. I have never worked out before, so I pretty much lift dumbbells horribly - about 20 pounds. I have a pull-up bar which is able to attach to my door, so I use that often now.
I'll go from that, but my question is, how can I increase body mass, build my body muscles, and keep fit?
I'll start from that.
check out the OP of the weightlifting thread
srs
if you have any questions after that, post in there and we`ll help out