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In mountaineering and in most endurance sports it is a well known fact that it takes a while to adapt to high altitude. This acclimatisation happens at about 300m/day and works up to about 5000 m (approx. 15000 ft). After a while, one can perform physical activities at altitude with the same efficiency as at sea level although the PPO2 of the ambient air is well below .21 Bar. It seems logical to me that when doing altitude dives one first acclimatises to the altitude for the dive if it is significantly different from where one usually resides. I have never seen any indications that being exposed to a higher PPO2 for short periods (e.g. a walk in the valley, a dive,...) has a significant effect on the acclimatisation. For longer exposures it will be clear that the adaptation to low PPO2 disappers. This however should only be important for very long dives(e.g. saturation dives of several days/weeks). Is there anyone out there who has been experimenting with high altitude dives? Would you like to comment on this? Regards, Joel Coopmans Supply Chain Software To dive or not to dive, Analyst-programmer that's the question. e-mail: u99854@kb*.be* tel : +32 2 422 7297
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