HOW: Get set-up sitting upright holding a flexbar with both hands. On the side you want to exercise, position your elbow bent in 90 degrees of flexion, palm facing up or in, and your wrist in a neutral position. While maintaining this position, rotate the flexbar down with your opposite hand as if you were wringing out a towel to create resistance in the flexbar. Slowly release and repeat. See video for more tips and instructions.
FEEL: You should feel the muscles on the inside of your forearm working as well as other muscles in your forearm and hand to help with gripping the object. You may feel tension on the inside of your elbow as well.
COMPENSATION: Do not lose elbow or wrist position.