6 This demand on internal rotation of the upper arm during tennis can result in an increase of internal rotatory forces across the elbow joint. In the third plane, valgus and varus, we also can ...
Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes when performing ... during an overarm tennis serve. Rotation – this is where the ...
Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes when performing ... during an overarm tennis serve. Rotation – this is where the ...