First off, being a Marine myself i can offer a few opinions for ya. Not trying to be a dick, but if you think you need to use steroids to have a pft good enough to get into recon, you DO NOT belong there to begin with. Forgetting the fact that using at your age is foolish for more reasons than can be listed, one or 2 cycles is not going to get you into recon, or benefit you in the long run. The LAST thing you need is to risk being not fully recovered going into boot camp. You need to train naturally to get where you want to go. You need to be strong mentally and physically ON YOUR OWN naturally, just to get thru boot, much less into recon. Besides, you are going to want to run more than anything else. I wish you the best of luck and really hope you rethink this whole thing.