HOW: Get set-up sitting upright with a surface next to you to support your elbow and forearm. With your elbow flexed to 90˚, position your forearm in a neutral position and your wrist in 20-30˚ of extension with your thumb facing up, and have your hand unsupported at the edge of the surface. While maintaining your wrist position, squeeze a rolled up towel or another object in your hand working on grip strength. See video for more tips and instructions.
FEEL: You should feel the muscles on top 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 outside of your elbow as well.
COMPENSATION: Do not lose elbow or wrist position, do not lift your arm off the surface.