2 doctors weighed in:
How can tight chest and back muscles affect arm movement?
2 doctors weighed in

Dr. Hallie Robbins
Physical & Rehabilitation Medicine
1 doctor agrees
In brief: Arm & trunk moves
Your arms don't stop at your shirt's shoulder seams.
Big muscles connect your arm and trunk: pectorals in front, latissimus dorsi to the small of your back and trapezius to your mid-back. Rotator cuff muscles and deltoids cap your shoulders. Shoulder blade stabilizers and neck mobilizers also play a part. Joint restrictions, too. Tightness in any can bind your arm.

In brief: Arm & trunk moves
Your arms don't stop at your shirt's shoulder seams.
Big muscles connect your arm and trunk: pectorals in front, latissimus dorsi to the small of your back and trapezius to your mid-back. Rotator cuff muscles and deltoids cap your shoulders. Shoulder blade stabilizers and neck mobilizers also play a part. Joint restrictions, too. Tightness in any can bind your arm.
Dr. Hallie Robbins
Dr. Hallie Robbins
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