Originally Posted by
terrymorse
I'm no expert in physiology, but I don't think blood oxygenation rises and falls in that manner.
What I've read says O2 saturation of the blood remains rather steady, until you go anaerobic (oxygen debt).
OK, yes... mis-spoken/written - Blood O2 is regulated by Blood chemistry, within a small range.
What does happen is the blood flow affects how much O2 is made available over time. Higher HR, more flow, more available O2 to diffuse into the cell.
Ride On
Yuri