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In this instructional segment, Eric Roberts demonstrates the optimal form for the dumbbell rear delt fly. He emphasizes keeping the shoulders back, leaning forward so the dumbbells rest just below the knees, and moving the weights laterally outward rather than backward. He stresses pulling through the pinky side of the hand instead of the thumb/index grip to better target the rear deltoids. Finally, he advises stopping the lift when the arms reach parallel to the floor to prevent shoulder shrugging and excess trap activation.
