[TPIN] Air out nose while playing normally?

[Rod Brawn]

Hi Gang,
    Today while playing some Clarke Exercises (Setting up Drills) and finding I didn't have the air to play them the suggested 4 times in one breath, I held my left had up under my nostrils while playing a long tone only to feel a very small amount of air coming out.  Is this something the rest of you have noticed while playing?  Is it normal for some air to come out this way?  I seem to be playing with good tone and all the rest.
    What do others experience?


Rod Brawn