Tight calves and ankles plague many karate people. Sometimes stretching is just not sufficient. Here is an informative video demonstrating the use of a foam roller to help get the kinks out of your calf muscles.

Caution: After about five minutes of using the foam roller I turn into a helpless blob of goo. It is habit forming.

Foam rollers, like those in the videos are available at the TKRI Martial Arts and Fitness Store. Click here to take a look.