For example, the elbow flexes when performing a biceps ... Ball and socket joints also allow flexion and extension. Flexion of the shoulder joint occurs when the humerus (upper arm) moves forwards ...

Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes when performing a biceps curl. Extension ... at the hip and shoulder joints during ...

5 These data reveal the extreme forces that the elbow must repetitiously absorb during tennis strokes in flexion and extension direction. In most sports with overhead movement, including tennis, an ...