Air break on rebreather, how to proceed?

[tbone1004]

We know why, lol.
You're not working in a chamber. Your sac rate is probably .25. You're expending zero energy, except during vent, you're nice and toasty warm and hydrated.

Otherwise, you're likely swimming, shoveling, pressure washing, cutting/burning, etc, etc etc. All of them causing at best just a slightly elevated heart rate.

IIRC, and it's been a few years since I was chamber riding with Dr. Pollock at Duke, but I seem to remember him saying that they tested resting in warm water but submersed. I think NEDU did that study at some point, but they tried to minimize variables to get to just dry vs. wet

 

[Akimbo]

@Akimbo when they did the tests at high ppO2 in the chamber while riding stationary bicycles, were they toxing like working underwater?

AFAIK, there were quite a few tests that could apply. Some tests over decades were specifically on OxTox while others were tangential -- breathing resistance, cold water tests, blood chemistry, etcetera.

As I recall, they started using stationary bikes long before I joined the Navy. I understand they choose the stationary bike because it was easier to log work load measurements while minimizing other variables.