By A Mystery Man Writer
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BBC Learning English - 6 Minute English / Is knuckle cracking good for you?
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Is cracking your knuckles bad for you? The science of your joints, explained
Is cracking your knuckles bad for you? The science of your joints, explained
Cracking Your Knuckles: Is It Bad for You?
Is cracking your knuckles bad for you? The science of your joints, explained