Kinetics of the knife-hand strike used in power breaking in ITF Taekwon-do

• Main Author: Jacek Wąsik
• Format: Article
• Language: English
• Published: PPHU Projack 2015-08-01
• Series: Physical Activity Review
• Subjects: taekwon-do; power test; analysis of movement; kinetics of punch; biomechanics of martialarts
• Online Access: http://www.physactiv.eu/wp-content/uploads/2016/10/2015_5.pdf

Description and analysis of a sports technique in terms of its compliance with the principlesof biomechanics and with regard to the efficiency of a given technique form the basis for the technicalaspect of a training process, which is supposed to result in enhancement of athletes’ sports performancelevel. The study was based on 6 ITF Taekwon-do (International Taekwon-do Federation) athletes (age16.5±0.7 years; weight 64.1±7.0 kg; height 176.5±4.6 cm). The study relied on an Italian system calledSmart-D, manufactured by BTS S.p.A., used for complex movement analyses. The system comprised sixcameras reflecting infrared rays, which in real time located the markers fixed to the athlete’s body. In thepresent study the maximum velocity of the sonkal yop tearigi strike reached 13.00 ± 2.35m/s. Thevelocity of the traditional fist strike seems to be lower. In this study the average maximum velocity wasreached at the length of the arm being equal 92% of the maximum length value. This length can betaken as the optimum value in this particular technique in order to achieve the maximum dynamics ofthe strike.