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It was discovered that the body would respond the same way as experiencing hypoxia if we had a sudden change in oxygen levels (a fluctuation), bringing the oxygen level up and back down. Bringing the level from high to low is being interpreted by the body as hypoxia.
Increasing pressure allows more oxygen to enter lungs. If we increase pressure and then decrease pressure to normal levels, it was descoverd to trigger the same response as hypoxia which triggers your body to create/stimulate stem cells.
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