I admit that I've never given belly breathing anything more than a passing thought, thinking it's more of a "yoga type thing" with no real application to running. Perhaps I've been wrong all these years.
Check out this video by Budd Coates Running On Air: Breathing Technique.
If you are like me, always on the lookout for new ways to run faster, I think you'll take some time to experiment with belly beathing and the "in-2-3," "out-2," "in-2-3," "out-2" easy and the 3 count 2:1 hard running breathing rhythm.
