Certainly. Like most other people said on here, he thinks it's breathing correctly. He has me breathing through a paper towel roll, and exhaling the same way, the whole "O" shape of the mouth and "Ah" in the throat. I've read Four Fundamentals of Troubleshooting for Brass Players by Bobby Shew, I'm really not translating the idea of breathing correctly to the horn. I feel like if I can understand, my endurance will improve dramatically.