<unk>  (also known as episodic hypoxia) is an intervention in which a person or animal undergoes alternating periods of normoxia and hypoxia. Normoxia is defined as exposure to oxygen levels normally found in earth's atmosphere (~21% O2) and hypoxia as any oxygen levels lower than those of normoxia. Normally, exposure to hypoxia is negatively associated to physiological changes to the body, such as altitude sickness. However, when used in moderation,<unk>  may be used clinically as a means to alleviate various pathological conditions.
Intermittent hypoxia
Histotoxic hypoxia
Silent hypoxia
Cerebral hypoxia
Pseudohypoxia
Acute toxicity
Central neurogenic hyperventilation
Sleep deprivation