Cracking your knuckles; it's something that you either love or loath.
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But what are the facts behind the clicks and clacks that drive school teachers up the wall?
Erica Eccleston is a senior physio and owner of Orange Family Physiotherapy. She says whenever someone finds out what she does, the question of whether cracking your knuckles is safe isn't far off.
"It doesn't cause arthritis, I think that's been debunked a million times and definitely a wives' tale," she said.
"I think the kids at school, their teachers still tell them not to do it, but It's fine, it's not going to do anything to you."
The same goes for cracking your neck, as long as you're the one doing it to yourself.
"It's a little bit different if someone forcefully cracks your neck," the physio added.
"I wouldn't be encouraging people to have their friends crack their necks for them if they don't know what they're doing as you can injure someone doing that."
Being a physio, she knows what she is talking about when it comes to the body.
But of all the myths that float about, there is one in particular which still grinds her gears.
"There is no such thing as cracking your back or your neck back into place," she said.
"That doesn't exist and I don't know why people are still talking about this or doing this.
"Your hips don't go out of place that they need cracking back in, it's just a really bad way of describing what's going on in the body.
"People might be getting pain around that area or your back but it doesn't mean the joint has gone out of place.
"The hip joint is a huge joint surrounded by these ligaments and it can not go out of place unless there is severe traumatic force like a fall from a height of a car accident.
"So that whole 'my back's out, I need someone to crack it back into place' is just so weird that people are still even saying that."
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