DunkO said...
the sherpers are flat out amazing in there abilities at high altitude.
I think Sherpa people actually have a genetic adaptation to assist with living at altitude. Many Sherpa Villages are at altitudes of 3,500m to 4,500m (above sea level), and some are even higher. Everest Base Camp is at about 5,500m. Then you have Camp 1, 2, 3 and 4 above that.
For Sherpa People, it's like climbing a 4,000m high mountain! But the "death zone" is still extremely dangerous for them too.
If you haven't been at altitude, this is what it feels like (for most sea level Aussies);
1500-2000m - no significant difference
2750m - most of us will notice a difference when you are walking around. You take a deep breathe, and it only feels like a 3/4 breathe... It just feels different.
3500m - same feeling, but more pronounced. Hollower breathes. You will notice that you feel much more "puffed" when walking up a hill. You will mostly feel the urge to stop walking up a hill, and just suck in some deep ones.
4000m - more pronounced again
4500m-5000m is the logical limit to stop at, for an average Sea Level Aussie, of average or just above average fitness.
Even at 5,000m, mountain sickness, or altitude sickness can easily set in. Western Walkers have died at these altitudes in the Himalayas. Storms can sweep over a mountain ranges very quickly, and the peaks are so tall on all sides, it blocks your view of a brewing storm. If extremely bad conditions set in, and you are alone on a minor peak, or even on descent at 5,000m, and you need to get back to 4,500... it's easy to visually lose your way, and if the light fades, and you are without a torch, etc... Things can turn sour very quickly! (Even at 5,000m)
Mountain Sickness Averages for Aussies at around 5,000m;
Up to 1/4 of us will develop effects at 5,000m and should descend immediately. Generally, the other 3/4's will be OK, but they will feel flat the next day, and be in denial that they have low level mountain sickness / mountain fatigue. If you "pop a magic pill" that night or the next morning, you will fell like your 6 cylinder engine (heart) is either firing on 8 cylinders, or running on a potent high octant mix!
Diamox is the magic pill!
en.wikipedia.org/wiki/Diamox