Originally Posted by Dinstee
Pardon my simplistic attempt- Are you trying too hard to breathe? Maybe you are shorting yourself of O2 by breathing in & out too quickly.
no pardon needed - it's a good thought. i think i breath at a regular pace until i notice i can't "fill up" all the way, then i think i speed up the breathing to compensate. so, i guess i do and i don't.