![]() ![]() The effect of a single instance would not be acute, but if you keep putting your brain in a hypoxic state (even if only moderate and not enough to cause fainting) over time then damage adds up (see studies of brain damage in mountain climbers, one example here - ). Fainting is a protective measure, but you must realise that the brain is already in a hypoxic state by the time it occurs, so there will likely have been brain cell death. ![]() The blood is already saturated with oxygen, so more breathing just makes things worse as it gets rid of the CO2 that is required to allow this oxygen to be used by the body. The second control mentioned (urge to breathe from CO2) also obviously does not apply as hyperventilation is by definition breathing too much. ![]() ![]() The first safety control mentioned in this video (compensatory increased blood flow to the brain) does not apply as it is disabled via vascular constriction (another effect of low CO2 levels in blood). Low CO2 causes Haemoglobin to bond tighter to oxygen in the blood (Bohr effect - ), so even though the blood is saturated with Oxygen it is not released to the cells in the Brain/Body for use. Excessive exhalation of CO2, causing low CO2 levels in the blood 2. Hypoxia from hyperventilation is caused due to the following sequence of events: 1. "The hyperventilation phase of Wim Hof could definitely cause brain damage over time due to hypoxia (low oxygen in the brain). ![]()
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