Abstract: 540 back spinning kick is a representative skill of modern free poomsae and crushing demonstration as well as an action with high difficulty. This research through attaining kinematic data of every step of 540 back spinning kick of successful and failed players in Korean Crushing King Competition held in March of 2014 with image measurement method and kinematic analysis has explored elements for practicing 540 back spinning kick successfully with a view to providing a scientific basis for teaching and training players of free poomsae.

Key words: Taekwondo, 540° back spinning kick, Successful Factor