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Measurement of isometric hip internal rotation strength. In the seated position with the hip in 90° of flexion and neutral frontal and transverse plane rotation, the patient was instructed to apply maximum force into the dynamometer for 5 seconds. The dynamometer was placed just proximal to the lateral malleolus of the ankle. Additionally, the patient was instructed to apply pressure to the outer thigh with the opposite hand to prevent hip abduction.
