Hi John

Thanks so much for dropping by and commenting. As I understand it, the heating/cooling process helps to loosen and tighten the affected muscles, generally relaxing the muscles and promoting blood flow that helps repair.

You aren't alone in the karate world in never having cared much about recovery. If you watch the way that Japanese and Okinawans behave, however, you'll see that they put focus on nutrition and recovery aspects. Modern sports science bears that out.

Plus it feels good.

Cheers

Des