Start: Grasp the dip bars with your arms extended and locked. Keep your body as vertical as possible to keep emphasis on the triceps and away from chest. If the dip bars are high enough, keep your legs straight below you.
Move: keep your elbows close to your sides as possible as you bend them to lower your body down until your upper arms are about parallel to the floor.
Press your hands forcefully into the bars to extend your arms and rise your body back up. .