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Reverse dumbbell flys, also known as posterior deltoid raises, develop several key muscles areas. They strengthen the posterior aspect of the shoulder muscles called the deltoid. They work the supraspinatus, infraspinatus and the teres minor, which are the posterior muscles of the rotator cuff. Reverse dumbbell flys also target the upper back muscles which pull the shoulder blades toward each other.

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Q: Which muscles are the prime movers in a dumbbell prone fly?
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