The Shoulder assessment is part of the Performance Plus Assessment Series. To test Shoulder Extension, lay on your back with your legs together and your arms at your side with your palms facing downwards. Activate your glutes by squeezing your butt and turn on your core by bracing your stomach lightly. Raise your arms overhead in a slow and controlled manner, externally rotating your shoulder while doing so (pointing your thumbs upwards and eventually toward the ground as you reach overhead). To pass the Shoulder Extension test, you should be able to touch your thumbs to the ground without bending your elbows or excessively arching your back.