 Poster: A snowHead
|
|
|
|
Obviously A snowHead isn't a real person
Obviously A snowHead isn't a real person
|
|
el Hen, do they get this from training at high altitude ?...or is it something artificially induced ?
|
|
|
|
|
|
Well, the person's real but it's just a made up name, see?
Well, the person's real but it's just a made up name, see?
|
Somewhat closer to home, all EosB 2008 Race competitors should note that jägermeisterglobin levels are to be closely monitored by the appropriate bodies .... 
|
|
|
|
|
|
You need to Login to know who's really who.
You need to Login to know who's really who.
|
|
Charlatanefc, and his new mate kristof, WILL be tested .....
|
|
|
|
|
|
Anyway, snowHeads is much more fun if you do.
Anyway, snowHeads is much more fun if you do.
|
Frosty,
http://icb.oxfordjournals.org/cgi/reprint/46/1/18.pdf
has an interesting summary of the most researched high-altitude populations and the differences between them, including differences in haemoglobin concentrations, the stimulus required for those haemoglobin concentrations, and the percent oxygen saturation of the haemoglobin that is present.
Have a look at Table 1. The Bolivian response at 19.1 gm/dl is higher than the concentrations of the FFS skiers. Of course, the frenchmens' altitude response, if such it is, is quite higher than that of average adult Ethiopian or Tibetan males at 15.8 gm/dl. How much of the genetic argument do you accept, and how much of the increased-number-of-breaths adaptation explanation?
| Quote: |
The classic Andean pattern is characterized
by high hemoglobin concentration, low oxygen
saturation, and an arterial oxygen content that is
actually about 16% higher than sea-level reference
values. The Tibetan pattern is characterized by essentially
sea-level hemoglobin concentration until very
high altitudes are attained, profoundly low oxygen
saturation, and an arterial oxygen content that is
about 10% lower than sea-level references values.
Represented by a single study, the Ethiopian pattern
is distinguished by levels of hemoglobin concentration,
oxygen saturation, and arterial oxygen content comparable
to those of healthy sea-level populations.
Considering these measures from a single study, it
is as if the Ethiopian sample were not living at high
altitude.
The two traits described are among many that distinguish
Andean and Tibetan high-altitude natives.
For example, Andean highlanders have relatively
lower resting ventilation, hypoxic ventilatory response,
exhaled nitric oxide, and stronger hypoxic pulmonary
vasoconstriction (Beall et al., 1997; Beall et al., 2001;
Groves et al., 1993). Thus, the natural experiment of
human colonization of three high plateaus has resulted
in two—perhaps three—biological outcomes. |
|
|
|
|
|
|
You'll need to Register first of course.
You'll need to Register first of course.
|
comprex, Thanks, I won't pretend to understand everything in that article but I think I got the gist of it. mmmm seems very difficult to see how those levels could be achieved naturally. I going to re-read (slooowly) the article tonight to see if I can understand a little more of it 
|
|
|
|
|
|
|
|
Frosty, sorry about that; I searched on Beall's name and there are far more readily approachable articles. 
|
|
|
|
|
|
|
|
|
|
|
|
FAQ