Triceps run down at the back of your upper arm. Triceps kickback exercise targets the triceps muscles on upper arm only as it is an isolation exercise. Bending forward is essential to perform correct move to engage your elbow with the muscle otherwise the workout becomes useless. Using proper technique is the key to get the maximum benefits of the move. Dumbbell triceps kickbacks are more useful to work on the largest muscle of the arm. Triceps kickbacks can be performed with two arms at the same time but one arm version is safer in order to balance your body on the other arm while working on one arm. Too heavy weights can cause injuries so try to choose one as per your fitness level.