One of the facinating things about Okinawan Karate is the unique Hojo Undo training.  Translated it means supplementary exercises.  These specialy designed exercises include Makiwara, Chi ishi, Nigiri Game, Ishi Sashi ,Jari Bako, Makiage Kigu, and Kongo Ken.  These exercises are used to improve the muscles used in actual karate techniques.  Many of these exercises may seem redundant, with the advent of modern day weight training, but the mobility attained  with them is what makes them of such great value.