"Polepole" (poe-lay-poe-lay) -- a Swahili term meaning "slowly, slowly" -- is what porters on Kilimanjaro say as you climb the mountain. It's also how you train for other long-distance mountain treks. Of the estimated 35,000 people that attempt to climb Mount Kilimanjaro in Tanzania every year, about half do not make it to the top. There are several reasons for this, but one of the primary blocks is people arriving to the mountain physically...