Running a lot of long distance like you do in track can have a detrimental effect on you muscle gains if you are not careful. Take a look at your distance athletes. The vast majority of them do not look like they spend any time with the weights whatsoever. With that said you can do your best to keep your gains by ensuring you have the proper diet with plenty of protein, train hard and heavy, and get plenty of rest. The problem is that with all of the running your body can very easily fall into a catabolic state and burn your muscle for fuel. Post your workout regimen and diet for a more tailored bit of advice. Good luck on keeping your hard earned muscle.
