No, double-jointed joints are not different from regular joints, they’re basically the same thing.
As a matter of fact, no joints are truly “double-jointed.” Instead, the joints and connecting muscles are merely more flexible and mobile, bending farther back than most people are capable of.
Although some people are born with a greater range of mobility in some or all of their joints, practice can produce similar effects.
Contortionists and gymnasts, for example, often stretch the joints backward to achieve greater flexibility. This great skill can be learned, and one way to find out how is to join the circus.
