Hello everyone. I am a high school senior planning to go to college for trumpet, and I am just having a really hard time. Marching band is killing me, and I have no idea how to deal with it. My chops give out on me in shows. We have a very weak trumpet section in our band, and no one plays if I don't play. It has been rough. I can play the music fine in the bandroom, but when it gets out on the field, it just falls apart. I don't know what to do. I am rolling my feet, even exagerrating, and on my toes backing up. I don't know what's happening, I just know my endurance and overall playing have drastically reduced since marching season started. And I, being section leader, am the one who isn't supposed to have these sorts of problems. Help? Please!