True or False: The Speed's / Biceps Straight Arm Test can be performed eccentrically moving into extension first with supination, then with pronation.

The statement is true because the Speed's/Biceps Straight Arm Test is designed to assess for biceps tendon involvement, specifically looking for pain or discomfort that may indicate biceps tendonitis or other related conditions. The test can indeed be performed eccentrically by moving into extension first, allowing for a more comprehensive evaluation of the biceps tendon under different forearm positions, such as supination and pronation.

Performing the test with supination targets the long head of the biceps tendon more specifically, whereas pronation might elicit different responses due to changes in the muscle's alignment and load on the tendon. This variation in testing positions helps the therapist better understand the patient’s condition, as pain responses can differ based on the mechanics of the biceps with respect to the arm's positioning and movement.

Overall, the flexibility to perform the test in both supination and pronation enhances the diagnostic utility of the Speed's/Biceps Straight Arm Test.