<P> The effects of high altitude on humans are considerable . The percentage oxygen saturation of hemoglobin determines the content of oxygen in blood . After the human body reaches around 2,100 m ( 7,000 feet ) above sea level , the saturation of oxyhemoglobin begins to plummet . However , the human body has both short - term and long - term adaptations to altitude that allow it to partially compensate for the lack of oxygen . Athletes use these adaptations to help their performance . There is a limit to the level of adaptation ; mountaineers refer to the altitudes above 8,000 metres ( 26,000 ft ) as the `` death zone '' , where it is generally believed that no human body can acclimatize . </P>
<P> The effects of high altitude on humans are considerable . The percentage oxygen saturation of hemoglobin determines the content of oxygen in blood . After the human body reaches around 2,100 m ( 7,000 feet ) above sea level , the saturation of oxyhemoglobin begins to plummet . However , the human body has both short - term and long - term adaptations to altitude that allow it to partially compensate for the lack of oxygen . Athletes use these adaptations to help their performance . There is a limit to the level of adaptation ; mountaineers refer to the altitudes above 8,000 metres ( 26,000 ft ) as the `` death zone '' , where it is generally believed that no human body can acclimatize . </P>
when do you feel the effects of altitude
when do you feel the effects of altitude
2,100 m ( 7,000 feet )
2,100 m ( 7,000 feet )