Hypoxia (also known as
hypoxiation) is a condition in which the body or a region of the body is deprived of adequate
oxygen supply. Hypoxia may be classified as either
generalized, affecting the whole body, or
local, affecting a region of the body. Although hypoxia is often a
pathological condition, variations in arterial oxygen concentrations can be part of the normal physiology, for example, during
hypoventilation training or strenuous physical exercise.