How To Perform Manual Resisted Test For The Infraspinatus Muscle 👉 The infraspinatus muscle is one of the four muscles that make up the rotator cuff in the shoulder. 👉 This muscle's contribution is crucial for various daily activities involving arm movement and overhead motions. 👉 Medical professionals employ a manual resisted test to assess the strength and functionality of the infraspinatus muscle. During the test, resistance is applied against the patient's effort to externally rotate the