eli5: why do humans brace for impact if going limp results in fewer injuries?

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Why is our instinct to brace for impact when falling, getting punched, getting into a car accident, etc., when going limp causes less injury/damage to the body?

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Anonymous 0 Comments

I think it’s important to point out that “bracing” yourself just means to “prepare” yourself. If you were to consciously go limp when hit as a Quarterback, for example, you’d have to “brace for impact” in order to do that in the first place.

The answer to your question I think Is that becoming tense and tightening up is part of our natural fight/flight response. If you are falling down, it is natural to throw your hands up in a surprised manner, trying to break your fall. You can’t do anything while your falling or approaching a crash but understand it is happening, and you are reacting to that stress.

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