Acclimatization

Acclimatization is when your body changes so it can better fit into a new environment. It is like your body learning a new skill. For example, when you move to a new place with a different climate or a different altitude (how high the place is), you have to get used to it. Your body will learn to get used to the new environment. It will do this by adjusting things like your breathing and your body temperature. When your body adjusts to the new environment, you are said to have acclimatized to it.