To enable all expedition members to acclimatize well and so maximize their chance of success, the expedition takes what I consider to be one of the best routes.
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Adaptation to the altitude takes time and there can be no short-cuts, even if supplementary oxygen is used in the final stages on mountains like Everest.
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The atmospheric pressure at the summit is half that at sea level which means you are breathing 50% less oxygen than normal.
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A thorough programme of acclimatization is built into the itinerary, which consists of regulated height gains and rest.
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Your guide, Sean James has summited Everest many times and has a vast knowledge of acclimatisation, altitude warning signs and how to treat cases.