Learn about the normal range of motion for shoulder flexion, extension, abduction ... referred to as external rotation — and the normal range of motion for a healthy shoulder is 90 degrees.

Allow the continued lowering until your elbows are at a 90-degree angle or when your ... to the floor and the elbows shoulder-width apart. Triceps Extension ... (flexion of the shoulder).

What Is Flexion vs. Extension . The difference between flexion and extension comes down to joint angle. Flexion. Flexion makes the joint angle smaller, bringing two body parts closer together.

For example, if I raise my arm 180 degrees over my head, every therapist should agree that my shoulder flexion/extension range of motion is within normal limits (WNL).