HOW: Start with a dumbbell in your hand by your side. Squeeze your triceps muscles to straighten your elbow and hold this position. While holding this position, ulnar deviate your wrist by moving the pinky side of your wrist back (see video for tips).
FEEL: You should feel your tricep muscle working as well as the forearm muscles in the back of your forearm. You may feel tension on the inside of your elbow as well.