2015, Volume 11, Issue 1
Kinematics of taekwon-do front kick
Jacek Wąsik1, Wojciech Czarny2, Eligiusz Małolepszy1, Teresa Drozdek-Małolepsza1
1Institute of Physical Education and Tourism, Jan Długosz University of Czestochowa, Czestochowa, Poland
2Faculty of Physical Education, University of Rzeszow, Rzeszow, Poland
Author for correspondence: Jacek Wąsik; Institute of Physical Education and Tourism, Jan Długosz University of Czestochowa, Czestochowa, Poland; email: jwasik[at]konto.pl
Background and Study Aim: Taekwon-do according to the theory of combat sports qualify for category consisting of in hits (strokes). This is of particular importance especially in the case of the traditional version of taekwon-do, in which a single kick might reveal the winner. The aim of the paper is knowledge about the influence of chosen kinematic factors on the front kick technique.
Materials and Methods: In the study 6 taekwon-do ITF athletes were examined (age:16.5±1.0 year; body mass: 64.14±10.9 kg; height: 176.5±7.5 cm). According to the criteria commonly used in biomechanical analysis of combat sports athletes were asked to execute the front kick (in taekwon-do terminology referred to as ap chagi). The foot and knee velocities in chosen movement phases were determined in the Cartesian coordinate system and so were the duration of particular phases of movement and the total duration of the complete kick.
Results: The maximum average foot velocity obtained was 10.40 ±0.77 m/s. The correlation and dependence values of the determined kinematic parameters and the maximum velocity of the kick denote that the maximum front kick velocity (p<0.05) is affected by the following factors: maximum knee velocity (r = 0.92), total kick duration (r = 0.73), total time of foot takeoff (r = 0.61).
Conclusion: The conducted research shows that in order to achieve the maximum foot velocity in the execution of the front kick an athlete needs to increase the velocity of the knee traveling towards the target and to decrease the duration of the foot takeoff.
Key words: analysis of movement, biomechanics, combat sports