Alright, I'm in the marching band at my school It's been getting colder outside. We just recently went championships (2nd place btw). We had to go on at around 10:45 pm and it was very cold. During the show though, I found it very hard to play at some points, as if I were playing for eight hours straight. In my 4 1/2 years of trumpeting, this happened to me very few times. Notes: I do not use excessive pressure. We warmed up properly (breathing, then buzzing, then playing) It wasn't from overblowing or playing for a very long time. Does anybody know of some sort of solution that can help me avoid this problem? It would be very much appreciated! PS: I asked my private teacher about it and he's really old and I don't think he understood what I meant.