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A > > If the tiredness [after diving] was due only to physical exertion, A > > is it I feel wasted after a 10-minute drift dive (no exertion) to A > > on air, but I feel great all day long after a 2.5-hr swim dive on A > > the same depth? This is a pattern that is repeated over and over A > Is it due to more oxygen in the system allowing the body to be bet A > clearing up as it goes the biochemical rubbish left by continuous ex A > fuel-burning? A > Do you feel tireder after the same duration air dive (1) near the A > or (2) below 100 feet? (2) has more oxygen AND more nitrogen than (1 I was under the impression that because higher partial pressures of Nitrogen were narcotic, they would act as a depressant on the nervous system, much the same way that alcohol and drugs do. The people I dive with have always refered to it as Nitrogen Hangover. My feeling is that once you drop the dissolved levels of N2 down below a certain threshold you don't notice the depressed effects anymore after the dive. If it was an exertion or fuel consuming issue I would think that the tiredness would more closely resemble the way you feel after moderate to heavy exercise which I don't notice. If I find that I'm exerting myself or breathing heavy (increased fuel consumption?) I might get a CO2 head ache but still feel good from using a high PO2 for deco. Mark Welzel /\/\/ --- � MM 1.0b3 � Unregistered � MailMaker - Your Windows offline reader!
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