Manual Muscle Testing of the Elbow

Elbow Flexion	The patient should be short sitting with arms at side. The therapist stands in front of patient toward the test side. The hand giving resistance is contoured over the flexor surface of the forearm proximal to the wrist, and the other hand applies a counterforce by cupping the palm over the anterior superior surface of the shoulder.
Elbow Extension	The patient should be prone on a table with the arm abducted 90 degrees, and the forearm flexed and hanging vertically over the side of the table. The examiner should provide support just above the elbow with one hand, and with the other hand he should apply a downward resistance on the dorsal side of the wrist.
Forearm Pronation	The patient sits on a table with arms at side and elbow bent at 90 degrees on test arm. The forearm should be in neutral. The examiner stands at side or in front of patient. One hand supports the elbow of the patient and the other hand grasps the forearm on the volar surface at the wrist, for resistance.
Forearm Supination	The patient sits on a table with arms at side and elbow bent at 90 degrees on test arm. The forearm should be in neutral. The examiner stands at side or in front of patient. One hand supports the elbow of the patient and the other hand grasps the forearm on the dorsal surface at the wrist, for resistance.

Adapted from:

Hislop, Helen J. & Montgomery, Jaqueline with contributor Barbara Connelly.

      Daniels and Worthingham's muscle testing: techniques of manual examination., 6th edition, 1995.