Why Do Knuckles Crack? New Scan Explains…

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I bet you have just tried cracking your knuckles after reading this title, if not then you’re probably resisting the temptation now! It seems that giving ones knuckles a good old crack is strangely satisfying, and until recently the reason as to why this ‘cracking’ or ‘popping’ sound occurred was a little unclear. Researchers performed an MRI scan on a group of people’s knuckles in order to glean some understanding on the cause of this ‘cracking’ sound. The scan confirmed what many people previously thought, that the noise is made by trapped gas escaping from the joint spaces. The process of cracking knuckles involves stretching the joint spaces which in turn cause gas to rush into the space, and it is this that causes the ‘crack’ sound. Researchers now want to understand what happens in the joint after the crack in order to understand how it (if at all) implicates joint health.

Source

BBC News, (2015). Scans reveal why knuckles go ‘crack’. Retrieved 20th April, 2015, from http://www.bbc.co.uk/newsround/32330824

About the Author

Job Role Qualified Dietitian and Sports Nutritionist Qualifications BSc (Hons) Sports Science | BSc (Hons) Dietetics Tom has always participated in sport both recreationally and competitively which led to an unquenchable thirst for information on anything health, nutrition and fitness. After leaving school Tom went on to play for a football academy during which time he studied Sport and Exercise Science. From here he went on to study a BSc (Hons) Sport Science at UEA followed by his second BSc (Hons) degree, this time at the University of Hertfordshire studying Dietetics. Tom has worked in the fitness, educational and clinical nutrition industry starting out at David Lloyd Health and Leisure Clubs. He then went on to work as a Dietitian (RD) in the NHS, during which time he conducted clinics for healthy eating, weight loss and weight gain, as well as specialised consultations on Diabetes, IBS and Coeliac disease to name a few. He has vast amounts of experience at devising diet plans and supplement regimens, as well as working in the community with schools and competitive athletes. As Head Nutritionist and Supplement expert at Discount Supplements Tom is here to provide current and evidence based health and nutrition information to help you reach your health and fitness goals!
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