... Want to take bets on whether that is done on a full inhale?
I did several experiments from 60' about 45 years ago to answer that question very question in my mind. I started each free ascent with what I judged to be at the low end of my "normal" respiratory cycle. It was a little worrisome until I got to around 40', but probably more because I was on the negative side buoyancy-wise. Remember, no BCs in those days so dives began on the heavy side with full tanks. Thankfully wetsuit compression was much less then due to the stiffer Rubatex material. Even at that age I wasn't stupid enough to do my free ascent exercises at the end of my dive.
Lots of variables... that's why divers need to experience it themselves. There's a lot more to discover than proof that the gas laws work.
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