ELI5, Why do UFC fighters get stiff when they take a hard hit?

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Basically, sometimes during a UFC fight when someone gets hit really hard or gets knocked out they will go completely stiff for a second. Why does that happen?

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4 Answers

Anonymous 0 Comments

Essentially it is their skin metasticizing. Like if they get hit really hard, the nerve endings localized to the area of impact cause a seizure like phenomenon in the brain whereby all muscles contract and release in rapid succession. Followed by an insane drop in blood pressure, increase of alluvial spasming, and contraction of the minor airway.

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