Perfect your rear delt flies with key form tips and common mistakes. Discover how to build defined, balanced shoulders safely and effectively. Dumbbell Rear Delt Fly Muscle Worked The rear delt dumbbell flies the primarily worked rear deltoid . In addition to its target, the main rear delt muscles, the dumbbell delt fly involves several synergist muscles. These muscles include the rhomboids, Infraspinatus, Teres Minor, and Teres major. A handful of other muscles work as stabilizers or play the role of stabilizers, including your Erector Spinae, Lateral Deltoid , Trapezius, Obliques, and Rectus abdominis. Rear delt crossovers are a simple yet powerful movement exercise which can do wonders for your upper body growth, posture, and overall functional fitness. In this comprehensive guide, I will show you the top ten benefits of rear delt crossovers and tell you in detail how this exercise works. The rear delts (also known as posterior delts ) are the muscles on the back of your shoulders. Strengthening the rear delts can help to prevent hunching and bad posture, and create stronger, stable ...
