Hi. I definitely understand that and truly believe that lifting weights has almost no benefits to badminton. However I have dropped a few of my classes because I'm trying to take it easy for my senior year and I have P.E. second period, and Weight Training third period, then lunch and fourth period, my last. I have block schedule. I want to know if there are any sort of weights I should do that is not totally useless. And to know if there are any movements and weights I should totally avoid doing, for I know I there should be some. I have a bit of a buff stature, and huge thigh and calve muscles, so I don't really need to work on those, unless there are some exercises that gives me more explosiveness. I also want to focus on the muscles that help and prevent any join injuries, because I have injured them in a fall during football in PE before and have fixed it after a few sessions with a Chinese chiropractor. I remember something about external and internal rotation that I was desperately trying to learn when it was hurting, I am now ready to do some of those exercises with real gym equipments. Again please don't tell me that there is no benefit of lifting weights. I know. But given my circumstances, I need to be lifting something for awhile. Thank you for reading.