Obviously, endurance is a frequent topic on TM. I believe I know the basic principles for increasing endurance (long tones, lips slurs etc.). I normally practice in 2 or 3 sessions throughout the day. I do not not often practice at the same time of day. Is it important to do so? Also another area of concern is that once school starts up again I will not have an opportunity to warm up much at all before the daily band rehearsal. Any recommendations for quick (five minutes tops) warm up? My normal warm up is 10-15 minutes.