Everyone is born with an external carry angle of approximately 15 degrees, which is an angle between the humerus and the ulna. In thinner people with thin subcutaneous fat and more pronounced bony markings, it is easy to see external rotation when the elbow joints are straightened bilaterally. In some people, the carrying angle is larger, even greater than 15 degrees, so it looks like a more obvious deformation on the outside. However, this condition does not affect usual activities, work or physical exercise. If the carrying angle is more pronounced, it may lead to an imbalance of forces in the elbow joint in middle-aged and elderly people, and degenerative arthritis of the elbow joint causing pain.