When you say drained are you referring to having it incised? If so, how large of an incision, what antibiotics are you on? It's a pain in the ass literally I know. I've treated many a Marine for it. If the incision didn't need to be made too large, then it shouldn't hold you up that long. Certain things like running, squatting, etc will prolly be the last type of exercises you do, but you can do other things in the mean time. For you pain will be the greatest indicator for what you are ready for. Be sure to take all of your antibiotics and keep it clean. The worst one I saw kept a Marine from training for 3 weeks, but I could put my fist in his. On average it shouldn't be that long.