I decided to start a new thread, but the question stems from another. A thread was recently posted about high school distance running and one of the weak points was breathing. In races and in most of my training, I breathe through my mouth (not gasping, but controlled). My lips are pursed of course and my mouth is not wide open. Now, I looked at some of the races from Bekele, El G and others and noticed that they may be breathing from their mouths or possible alternating. I watched an entire 5k with Bekele, and he is certainly not breathing just from his nose. I bring up the best runners in the world because obviously they are doing something right. Any thoughts? Am I wrong about Bekele and others?