Abduction – movement away from the midline of the body. This occurs at the hip and shoulder joints during a jumping jack movement. Adduction – movement towards the midline of the body.

Deltoid Abduction ... the shoulder which helps to prevent dislocation and allows the shoulder to rotate the humerus around its own axis A throwing action such as a javelin throw Pectorals ...

volleyball spiking and serving result in greater shoulder abduction and horizontal adduction at the moment of ball contact/release than do baseball pitching or tennis serving. Conclusion The authors ...