Roca Ball wrist flex exercises build forearm and hand strength. Take one ball and with either the palm of the hand facing up or facing down, flex the hand up and down at the wrist. Use a one pound or two pound ball depending on your hand size and strength. You can also move the ball towards the tips of your fingers for a different grip and weight feel. This exercise can be done standing or while sitting. You can support your forearm by placing your forearm on a chair arm rest, on by placing your forearm on your leg when sitting.
This exercise is also good for helping treat injuries like tennis, climbers, or golfer's elbow. Ten repetitions per each directional movement is a suggested amount, but do more or less depending on your strength. If you have an injury, or history of an injury, always consult with a doctor before doing exercises with weights.