I heard Amber say something interesting whilst discussing traing at altitude. She said that at sea level we are breathing off CO2, abd at altitude the limiter is O2 saturation. I was wondering if we know where the crossover is?
I heard Amber say something interesting whilst discussing traing at altitude. She said that at sea level we are breathing off CO2, abd at altitude the limiter is O2 saturation. I was wondering if we know where the crossover is?