by madeintahoe » Wed Sep 01, 2010 6:14 pm
by Dow Williams » Wed Sep 01, 2010 6:47 pm
by mconnell » Wed Sep 01, 2010 7:57 pm
by rhyang » Wed Sep 01, 2010 8:38 pm
by mconnell » Wed Sep 01, 2010 10:21 pm
jschrock wrote:mconnell wrote:As for not really gaining anything by living at 6300', I disagree. There are many people that struggle at 6300' elevation and need time to acclimatize even at that level so there is some benefit to already being acclimated to that elevation, although it might not be long term.
You might be misinterpreting my comment.
My comment is directed at the implication that living at 6,300 for 23 years should have provided the OP with any greater level of permanent acclimatization than anyone else who has spent a few days at the same altitude. Acclimatization is not permanent ... that's all.
Yes, there is a physiological benefit to living at 6,300 and most people require some time to adjust.
by Buz Groshong » Wed Sep 01, 2010 10:27 pm
jschrock wrote:rhyang - could be true but I've never seen anything indicating true long term physiological change. I guess it partially depends on your definition of 'long term'.
Quotes that apply to your comments from the only study I have handy......red blood cell volume does not increase the first 1-2 weeks of altitude residence, and significant increases in red blood cell volume are only seen during high altitude exposures exceeding 16-20 daysIn well-acclimatized personnel, effective altitude acclimatization will be maintained for about 5-7 days at low altitude. It is possible that occasional exposures to high altitude will delay de-acclimatization...
Like I said...I haven't seen anything indicating long term measurable benefits. I'd be interested if it's out there though.
by rhyang » Wed Sep 01, 2010 11:47 pm
Full hematological adaptation to high altitude is achieved when the increase of red blood cells reaches a plateau and stops. After that period, the subject below extreme altitude is able to perform his activities as if he were at sea level. The length of full hematological adaptation can be approximated by multiplying the altitude in kilometers by 11.4 days. For example, to adapt to 4000 m of altitude would require around 45 days. However, no length of adaptation can allow humans to permanently live above 5,950 metres (19,520 ft).
by Buz Groshong » Thu Sep 02, 2010 2:35 pm
jschrock wrote:Buz - I'd be curious to determine if those characteristics are genetic or individual adaptation.
Kinda cool if really the case either way though.
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