I totally understand how you feel. Honestly, both are important to you. It kind of depends. I'm in a similar situation, although I don't have 2 sports, I do run on my own time (well okay that is a second sport but it's on my own time so it's not planned), and then caring for my horse, in addition to the whole other array of activities I do as well as homework. Yes, it is a lot! First, you need to eliminate any things that waste time. If you social network or spend a lot of time watching tv, you should still relax, but try to cut down because time is valuable! Try to get your homework done ASAP. If you are being picked up from school late, do homework. EVen 5 or 10 minutes helps! Use all of your time. If after 2 weeks of trying to balance it all you feel like you want to tear your hair out, then it might not be working for you and you might have to cut something out of your schedule. I personally would suggest 4 days a week, but that's just my personal preference.. a trainer or vet could give you a better idea of training your horse and what the minimum physical activity should be. I understand schedule conflicts.. trust me!! God bless :) try your best!