Is There Any Downside to Being Double-Jointed?

Growing up, were you that kid at the party who could twist your body into a pretzel or bend your fingers all the way backward?

Hyperextending a limb may feel normal to you — and most of the time, if you’re so-called “double-jointed,” it’s not harmful to your body. But rarely, it can be a red flag for other health conditions.

What does it mean to be double-jointed?

In reality, there’s no such thing as being double-jointed. (Wait, what?) The term implies that you have two joints where there should be one, which isn’t possible, says orthopaedic surgeon Michael Star, MD.

What people think of as double-jointedness is actually hypermobility, or joints that can move beyond the typical range.

Your joints are made up of connective tissue and a protein called collagen. If connective tissue is a building, collagen is the bricks. Hypermobility results from the variation in how those bricks come together.

And you don’t have to be a contortionist to be considered hypermobile. “Everybody has a different level of flexibility. For example, dancers and gymnasts can bend over backward — and then there’s me, who can’t even touch the floor,” Dr. Star relates.

Why can hypermobility be a problem?

About 20% of people are hypermobile. Some of them are also at increased risk for shoulder and knee dislocations. But unless hypermobility coincides with significant pain or recurring injuries, there’s usually nothing to worry about.

“Doctors will likely recommend physical therapy, activity modification and strengthening exercises,” Dr. Star says. “These activities give much-needed stability to the joint.”

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