The rules of Thai boxing have been developed from the Sukhothai period up to the present. In the past, boxers were told not to bite or spit in the opponent's face. While fighting, they could run away, but not hide. The boxer had to fight until his opponent was absolutely defeated. Nowadays, each fight covers not more than five rounds over 25 minutes. Each round lasts three minutes and the boxers can rest for two minutes. This makes Thai boxing less dangerous. It often ends when the referee counts one fighter out (aftet a knockdown) or decides that a boxer can no longer defend himself. Sword Fighting or Krabi Krabong consists mainly of straight swords, curved swords, daggers, arm protectors, lances, halberds, spears and sticks. This fighting skill needs a long period of training. This led to the preparation of good warriors in the past. The skill of fighting is determined by the use of various weapons and how fast a fighter can attack his opponent and withdraw in order to charge and attack again. During training, all weapons must be kept in the proper place treated with respect. Before any fight, Muai and Krabi Krabong, boxet and fighters have to perform a dance in order to show respect to their instructors. Also the prelude musc is to decrease the fighters' nervousness and encourage them to fight. Most of all the boxers and the fighters can learn their opponent's tactics through their dancing. In this way, they also plan how to defeat their opponent while dancing.