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The Science of Being ‘Double-Jointed’
The Science of Being ‘Double-Jointed’0Some people can bend their fingers or limbs in seemingly impossible positions. We often refer to this unusual flexibility as double-jointedness, but physicians and researchers call it hypermobility or joint laxity.

In reality, having extra joints has nothing to do with this condition. Instead,

the increased range of motion usually comes from the soft tissue surrounding the joints ? ligaments and tendons ? and the joints’ shapes. Ligaments connect bones to other bones, while tendons connect muscles to bones. The elasticity of these tissues varies from person to person, influencing their flexibility. People with hypermobility often have looser ligaments, which allows for an increased range of joint movement.

The body has many different types of joints, from immovable ones in the skull to highly mobile synovial joints. Among these, the ball-and-socket joints in the shoulders and hips are the most mobile. Some people with hypermobility have ball-and-socket joints with shallower sockets, increasing their mobility.

Hypermobility can also result from the physical shape of the bones. For instance, the elbow joint consists of a hook-like bone called the olecranon fitting into a groove on the humerus. If this hook is small or the groove is deep, it allows for increased extension, sometimes leading to the appearance of hyperextended elbows.

Research indicates a genetic component to hypermobility, with identical twins more likely to display hypermobility than fraternal twins. Moreover, hypermobility tends to diminish with age and varies across different populations, with higher prevalence in women and people of African, Asian, and Middle Eastern descent.

Interestingly, studies have linked hypermobility to various physical and mental health conditions. For instance, being double-jointed has long been associated with an increased risk for asthma, irritable bowel syndrome, and other disorders. Hypermobile individuals are also more prone to anxiety, with heightened brain activity in related areas.



Hannah Kim
For The Teen Times
teen/1718582099/1613367687
 
인쇄기능입니다.
1. What is double-jointedness? What is this condition associated with, according to paragraph 2?
2. What kind of joints does the body have? What is said about the most mobile joints and people with hypermobility?
3. What is said about hypermobility and the physical shape of the bones? Explain with the example of the elbow joint.
4. What is said about the genetic component to hypermobility?
 
1. What are the pros and cons of hypermobility? Explain.
2. How can you take care of the joints in your body? What about the muscles?
3. What are some sports or exercises you can do with flexibility? How beneficial are they?
4. What are some things that are inherited through genes? Explain.
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