Crack Research: Good news about knuckle cracking - Scientific American
Thursday, October 16, 2014
The latest physical anthropology research indicates that the human evolutionary line never went through a knuckle-walking phase. Be that as it may, we definitely entered, and have yet to exit, a knuckle-cracking phase. I would run out of knuckles (including those on my feet) trying to count how many musicians wouldn’t dream of playing a simple scale without throwing off a xylophonelike riff on their knuckles first. But despite the popularity of this practice, most known knuckle crackers have probably been told by some expert—whose advice very likely began, “I’m not a doctor, but ...”—that the behavior would lead to arthritis.