Tricep kickbacks are intended to target and isolate the tricep muscle located on the posterior side of the arm. They’ll get your arms burning! I often recommend these for individuals who are trying to cut down on under arm fat. Although it will not totally get rid of excess fat, it will however help tighten the area up. Make sure your arm is in line with your back and that you ONLY extend at the ELBOW. For the elbow up your arm should not be moving. Make sure your back is nice and straight. Give it a shot!