So I've been in marching band for several months right now, and it's an awesome experience for me. I really enjoy it, and I hope I could do it again next year. (I'm thinking about posting a Youtube link of our show) Anyways, I've been having this problem lately, that during the middle of our show, my upper body starts to tenses up and I start to feel pain in my shoulders. I get pretty tired because of that. Perhaps the problem comes from trying to bring my bell up, I don't know. So year, it'd be really great if someone could help me with this problem.