Sports science in English
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The temperature drops and the air becomes more rarefied with altitude and, also around 3000 metres, one can have the symptoms of altitude sickness, which are as follows: nausea, loss of appetite, severe headache, followed by trouble breathing, coughing up mucus with blood, vomit, loss of balance and feeling faint and numbness.

To avoid altitude sickness, it is necessary to climb slowly, so as to allow the body to adapt to the different percentage of oxygen by increasing the rate of red blood cells to oxygen uptake. In any case, often the only remedy for altitude sickness is to descend.