I've been practicing this for about a week. I have to say that it's pretty cool. Now I run until my legs give out which is a little longer than the duration for the intercostal muscles I used for breathing. But when I expand my stomach for inhaling, especially late in the run, there is this weird interaction between the lower stomach and the front leg. It almost like I can time it so that the expanding stomach won't get in the way of the leg in front. Anyone experienced the same?