High-altitude training Climbing the “Matterhorn” in Berlin The oxygen content of the air at sea level is 20.9 percent, and the com- mon flatland dweller is accustomed to breathing air at this concentra- tion. When someone living at 35 metres above sea level rushes off on holiday to the Alps they become a little short of breath at first. With increasing height, the air gets thin- ner because of the falling air pres- sure, there is less oxygen and

Join for free to read