Why Are Some People Double-Jointed?

First and foremost, let’s debunk a common myth: being “double-jointed” doesn’t mean someone has extra joints. The term is a colloquialism that describes a person’s ability to move their joints beyond the typical range of motion. Medically, this phenomenon is known as hypermobility.

Why Are Some People Hypermobile?

The reasons behind hypermobility are a blend of genetics, biology, and, sometimes, specific conditions. Here’s a breakdown:

• Genetics: Just like eye color or height, our genes significantly determine our joint flexibility. If your parents or grandparents could perform these unique bends and twists, there’s a good chance you might inherit that ability too.
• Collagen Structure: Collagen is a protein that provides strength and elasticity to our skin, tendons, and ligaments. The structure and composition of collagen in hypermobile individuals can differ from the general population, making their connective tissues more elastic.
• Joint Shape and Bone Structure: How our bones fit together in their joints can also influence our range of motion. Some people naturally have shallower joint sockets or differently shaped bone ends, allowing for more movement.
• Muscle Tone and Length: Muscles play a pivotal role in joint movement. Individuals with longer muscles or lower muscle tone might experience a greater range of motion in certain joints.
• Underlying Conditions: Some medical conditions, like Ehlers-Danlos Syndrome (EDS) or Marfan Syndrome, can cause hypermobility. These conditions affect the body’s connective tissues, making them more stretchy and flexible.

Is Being Double-Jointed Good or Bad?

Like many things in life, being hypermobile has pros and cons.

Pros:

• Flexibility: Many athletes, especially gymnasts, dancers, and yoga practitioners, benefit from the added range of motion.
• Unique Party Tricks: Being able to bend and twist in unusual ways can be a fun conversation starter!

Cons:

• Joint Pain: Over time, excessive movement can lead to wear and tear on the joints, causing pain or discomfort.
• Higher Risk of Dislocations: Hypermobile joints can be more prone to popping out of place.
• Potential for Overstretching: It’s easy to push past what’s safe, leading to strains or injuries.

Being double-jointed or hypermobile is a fascinating quirk of human biology. While it offers some benefits, especially in activities that require flexibility, it’s essential to be aware of the potential drawbacks. 

If you’re hypermobile, consulting with a medical professional or physical therapist is a good idea to ensure you’re taking care of your joints and muscles properly. 

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Written by Geraldine Orentas in partnership with Stethoscope.com stethoscope distributors. 

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