The Sunday Telegraph (Sydney) - Body and Soul - - HEALTH -

This say­ing was prob­a­bly cre­ated to stop some­one’s an­noy­ing habit, but there’s no ev­i­dence that crack­ing your knuck­les re­sults in arthri­tis. So say ex­perts at Har­vard Med­i­cal School in the US, who re­viewed stud­ies com­par­ing rates of arthri­tis among those who do and don’t do it. The sound oc­curs when gas bub­bles form in the flu­ids be­tween your joints and are re­leased by a sud­den move­ment. It’s not thought to be harm­ful and doesn’t mean you have a func­tional is­sue with your knuck­les – or any other joint that makes the sound.

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