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On Thu, 21 Sep 1995, Dan Volker wrote: > VO2 max will be the critical measurement because it not only relates the > rate of gas exchange, it does it in relation to the volume of the > individual's body (and of course larger volumes hold more dissolved > gas)...As VO2 max goes up, usually the volume or weight of the person is > decreasing. Very large people have typically low VO2 max values even if they > have a powerful heart, because there is so much volume for transfer to take > place within. > Dan > dan: aren't VO2Max measurements done at heartrates of 180-210 bpm (with the poor subject on an ergonometer with tubes, hoses, wires dangling)--at the break between aerobic/anerobic effort? does this really apply to diving? it's my recollection that the difference between VO2max for elite and poor fitness was about 50% when fractioned by body mass. so a stud can use 2x as much O2 as a dud at max output (and hence come up with more energy to out-put). performance-wise this would translate to a the stud's world championship cycling time trial feeling like a ride in the park for the dud. if our champ went for a dive in the park, his O2 (or just gas) consumption rate would be much lower than during the tt--and nowhere near his VO2 max. i'd think the low %fat, large potential O2 window (due to large arteriovenous O2 extraction), low heartrate, increased perfusion and ventilation of an athlete would outway any danger. btw, the one ref. that comes to mind about a bent athlete was reported by the institute for nautical archaeology a few years ago. one of their divers did a hard workout got DEHYDRATED and bent the next day diving. or maybe it was just grade 4 bubbles.... regards, eric _____________________________________________________________.sig Eric Maiken email: eapg243@ea*.oa*.uc*.ed* Dept. of Physics o: 714 824-6621 U of California fax: 714 824 2175 Irvine, CA 92715-4575
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