![]() “These joints are called synovial joints and are surrounded by a fluid-filled capsule.” That fluid, called synovial fluid, is there for lubrication and is made up of dissolved gases-mostly nitrogen, Curda says. “ Knuckle cracking is the audible sound that occurs when the joints of your fingers are stretched,” says Curda. Actually, the process has to do with your joints. “Many believe that cracking knuckles is the bones realigning, which couldn’t be further from the truth,” says Weiss. ![]() It’s a simple question, but one most of us have asked ourselves: What’s at work in the body when we hear that popping sound? To find out once and for all, I spoke to San Diego–based chiropractor Ryan Curda, DC, as well as New York City–based physical therapist Scott Weiss, DPT.įor medically supported answers to all the questions you’ve ever had about cracking your knuckles, keep reading. Cracking my knuckles isn’t actually harming me, right? Actually, while we’re asking questions, what is knuckle cracking, anyway? Plus, I’m sick of hearing people tell me I’m damaging my joints. Even I’ll admit that the noise is disturbingly loud for such a small action. That said, I don’t want to be the person who pops her knuckles all day at work. Sure, I’ve gone through sober periods where I’ve put my habit on hold, but mostly, cracking my knuckles feels as necessary as scratching a needling, torturous itch. (I even force my boyfriend to crack my back for me sometimes-a textbook case of codependence.) Elementary school? By now, cracking my knuckles is as deeply embedded in my lifestyle as applying lip balm when my pucker feels dry or eating when I’m hungry. I don’t even remember when I first started. I’ve been popping my fingers, back, neck, and other appendages for years. ![]() And I know, my knuckle-cracking habit isn’t exactly flattering. “Doesn’t that hurt?” “It will give you arthritis!” “That’s the most bone-chilling sound in the world.” ![]()
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