Hey all; so my teacher assigned me to work on lip trills, mostly out of the Arban's book (dont know what pages they are on on the top of my head) but i noticed while i am doing them, mostly half way through the exersizes, the back of my throat is tensing up. To me, it doesnt sound like my sound is affected at all, but i dont want to get in the habit of tensing up the back of my throat when playing. any suggestions? i've tried slowing down the exersizes; long, full breathes, etc but when i get back up to speed it still tenses up a bit. I'm not over worried about this; it's just something that i am thinking in the back of my head when i am practicing these exercises. Thanks everyone!