Kettlebell Renegade Row Exercise Full Anatomical Analysis. Renegade Row will build your core strength as well as provide a great challenge due to the balance required to perform this great and not so easy exercise. The first part of the movement is shoulder extension, the main muscle – latissimus dorsi, the rear deltoid, and the other synergist muscles. In the second part, if we continue the movement and move the elbow behind the body (overextension), the rear deltoid becomes the dominant muscle