To do kickbacks you will need to stand bent at the waist to a 45 degree angle, and lean one hand on the bench for support. Use your other hand and take hold of a dumbbell. Then keep your upper arm stationary and elbow tight against your body and straigten(sp) your arm by moving the weight backwards, behind your body, until your elbow locks. You can pause and squeeze at the top.Do a set of 8-10 reos and switch to the other arm.