I have picked up the trumpet after a few years of taking off from it. So far I have been working in Arbans and have practiced several times a week all summer, but for the past 3 weeks it has been 5-7 days a week. I have noticed that my lip now feels weaker then it did 2 weeks ago at notes around C and D one staff up. Should there be days of rest to let the lips rebuild, or is there something I need to do differently in practice. Also I was taking Acutane for 1 year which left me unable to get simple notes out on the staff and caused my lips to bleed. Last night for the first time I was concentrating on long tones and had a tremendous tone and playing improvement through Arbans’ solos. Right now I want to build up a strong "core" with a range of notes above the staff and below the staff, during long practice sessions. Are long tones the key to this? Please offer any other practicing tips as well.