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What Makes Your Knuckles Pop?
"If you've ever laced your fingers together, turned your palms away from you and bent your fingers back, you know what knuckle popping sounds like."

Knuckle Cracking Q&A
"Why do people crack knuckles? Cracked knuckles feel looser and enjoy more mobility for awhile after cracking."
Ask a Scientist: Does Cracking Your Knuckles Cause Arthritis?
"There is no compelling scientific evidence that cracking your knuckles causes arthritis."

Ever Wondered if Cracking Your Knuckles is Bad for You?
"If you're a kid, chances are you either crack your knuckles or know someone who cracks theirs."

Does Cracking Knuckles or Joints Cause Arthritis?
"Cracking of joints, also referred to as 'popping', is a form of joint manipulation that produces a popping or cracking sound, as may occur during knuckle-cracking, a deliberate action."

What Makes the Sound When We Crack Our Knuckles?
"To understand what happens when you 'crack' your knuckles, or any other joint, first you need a little background about the nature of the joints of the body."

How Arthritis Works
"Many of us think of arthritis as a condition that causes old people to rub their hands together and predict changes in the weather."

Knuckle Cracking and Hand Osteoarthritis
"Previous studies have not shown a correlation between knuckle cracking (KC) and hand osteoarthritis (OA). However, one study showed an inverse correlation between KC and metacarpophalangeal joint OA."

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