What in the butt acclimates when we ride a new saddle or return to riding after a layoff?

Subject line pretty much states the question. Posters in rbt historically refer to some adjustment
that our butts make in response to a new set of stresses.

Please post new sets of facts or plausible theories. I've already done the required deja/google
rbt search.

Thanks!

Jim Wilson

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I ride my bicycle to ride my bicycle.