Objective: To determine if the combined isometric contractions of knee extension/hip adduction and knee extension/hip abduction will elicit a different quadriceps and gluteus medius electromyographic ...
Key fact Flexion and extension are a pair of opposites; abduction and adduction are a pair of opposites. Circumduction – this is where the limb moves in a circle. This occurs at the shoulder ...
Extension – straightening a joint. This occurs when the angle of a joint increases, for example, at the elbow when putting a shot. Abduction – movement away from the midline of the body.
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