Execution
Stretch out your arm so it extends in front of you with the palm facing down and with your fingers pointing down. Using your other hand grasp the back of your hand and then bend your wrist downwards a little more, until you feel tension in the outside of your forearm.
Frequency
Hold this position and count for between 8 to 15. Repeat this two or three times.
Now do the same exercise for the wrist flexors but this time with your palm facing up (your hand and fingers pointing down); you will now feel the stretch on the inside of your forearm.