– Why do people pass out when subjected to high g-forces?

Question

– Why do people pass out when subjected to high g-forces?

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Answer 1

Large G-forces tend to squeeze blood towards one end of the body, preventing it from circulating normally and depriving the brain of oxygen. Reduced oxygen supply to the brain results in tunnel vision, blackouts, and loss of consciousness.

https://en.wikipedia.org/wiki/G-LOC