Originally posted by M.C. Reinhardt:
I am going to climb Mt. Adams and St. Helens at the end of May. This should help me to acclimate better for Whitney on June 9th. I am hoping that Whitney will help me to acclimate for Kili on June 23rd. Am I correct in this thinking? I believe this way of acclimatizing has helped me in the past. Or is this just old school thinking...any thoughts?
The traditional rule of thumb is that acclimatization lasts for about the same amount of time that it takes to get it. So if you are up at altitude for three days, you have about 3 days at sea level before it "wears off". The real physiology is more complex than this (red blood cell counts change very slowly while hemoglobin binding of oxygen changes very quickly), but it gives you a rough idea.
So the airplane flight to Africa (with a cabin pressure around 8,000) a day before your climb will probably help more than a few days at altitude 2 weeks before you leave. There are some good day hikes around Kili to help you acclimatize as well as taking the longer route up Kili (pole, pole, as they say meaning slowly, slowly). I saw some numbers once that only half the climbers make the Kili summit on the 3 day route while 75 - 80% make it on 5 day or longer routes.