What does being double jointed mean?

Being double jointed means that you can bend your joints more than the average person. There are many misunderstandings when it comes to the meaning of being double jointed. In one case, the term itself implies that double jointed people have twice the number of joints than normal human beings. Some even assume that double joints allow for twice the usual amount of motion. However, these meanings are myths. All human beings have the same number of bones and joints, all of which have similar capacities for movement.