Ok so i was practicing some dynamic last night, and i kept thinking "why am i still exhaling as i near the end?" I swim 20 m then turn and push off and swim the 20m back (from 3.5 feet to 10.5 feet ). Any ideas? Am i still not relaxed enough? I think i need to breathe differently, maybe? I did not have any "urge" to breathe, just an "urge" to let my held breath escape?