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Excercise with pure O2 at sea level will produce insignificant changes in aerobic performance, or ability to perform work. You will feel equally tired as with air. The blood can only hold so much O2 for transport, and extra O2 added will just be wasted. O2 at depth (1.4 ppo2 or somewhat higher), what could be called hyperbaric oxygen therapy, places higher concentrations of oxygen in to cell tissues because of increased gradient. This is what causes better recuperation and less fatigue. Regards, Dan >Dear All, > >Perhaps the following has been tried or if not would shed some light on >the O2 vs. Air debate with regard to exercise and tiredness. > >Using resting heart rate as a measure of tiredness (common among athletes). > >Get a subject (the more the better for stats) to exercise at a fixed >rate for say 1 hour on a bicycle using air. get them to do this for a week >and measure there heart rate at different times of day. this should give you >an idea of how tired this level of exercise makes one. > >repeat the exercise using O2 and monitor heart rate (possibly repeat with >21/79 heliox to model N2 vs He). > >The whole lot could then be repeated at varying depths with varying mixes >until mix vs. depth vs. tiredness data was established. > >I would have thought that using higher ppO2 would produce least tiredness >due to extra O2 supplying muscles with more 'energy' and keeping the exercise >aerobic, hence reducing anerobic stress > >However, how would the N2 vs. He experiment work??? > >The exercise could also work by comparing anerobic exercise with aerobic! > >ANY COMMENTS, Or has this already been done? Or do I get a big grant and >and start having fun. > >yours Jon. >-- >Send mail for the `techdiver' mailing list to `techdiver@terra.net'. >Send subscription/archive requests to `techdiver-request@terra.net'. > > Dan Volker SOUTH FLORIDA DIVE JOURNAL http://www.florida.net/scuba/dive 407-683-3592
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