> > I don't want to say this isn't so but I was under the impression that the > > tiredness was the result of accumulated Nitrogen in the nervous system. ... > > I always thought that tiredness from diving is caused by the same thing as > tiredness after a day navvying or a day shifting goods in the docks etc. The > average aqualung diver is hydrodynamically a bad shape, and pushing all that > lot through dense water for an hour or so uses up a LOT of energy. If the tiredness was due only to physical exertion, then why is it I feel wasted after a 10-minute drift dive (no exertion) to 100 feet on air, but I feel great all day long after a 2.5-hr swim dive on nitrox to the same depth? This is a pattern that is repeated over and over for me. Aloha, Rich
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