High altitude sickness12/31/2023 ![]() It is rare at altitudes of less than 2500 metres (8,000 feet) and is more common at altitudes of 3500 metres (11,500 feet) or more. ![]() A change in your breathing pattern at night.Īltitude sickness is something that can affect people who climb or travel to an altitude of more than 2500 metres, particularly if they climb or travel up (ascend) too quickly.Shortness of breath on exercise or increased activity (exertion).An increased breathing rate or feeling that you are breathing more deeply. ![]() Your body also makes more red blood cells to help with oxygen transport around your body.īecause of these changes in your body, there are some 'normal' symptoms that you will notice at higher altitudes while your body is acclimatising and adjusting to the reduced availability of oxygen. You will notice that your breathing rate will start to slow down. This means that you have to breathe faster and deeper to get oxygen into your body.Īfter a few days, your body starts to adjust (acclimatise) to the higher level of altitude that you are at. So, at high altitude, each breath that you take will contain fewer oxygen molecules. However, because of the lower air pressure, there is actually less oxygen available because the air is thinner (it contains less of all of the gases in a given volume). Air still contains the same proportion of oxygen (21%) at high altitude. What are the normal responses of the body to altitude?Īs you move up (ascend) to higher altitudes, air pressure reduces.
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