Dumbbell Kickback

Description

Grab two dumbbells and lean forward at the waist so your torso is close to parallel with the floor. Start with your arms bent, upper arms roughly parallel with the floor, and elbows in tight to your sides. Keeping your upper arms stationary, contract your triceps to extend your elbows so that your hands go back behind you (the "kickback" motion). Squeeze your triceps at full elbow extension, then slowly lower back to the start position.
 
Tips
Focus on keeping your elbows up and in tight to your sides throughout the entire movement.