Potential of motion analysis technologies in the quantitative study of karate technique: An experimental approach for the jump of Unsu Kata

This study presents the results of quantitative analysis of the karate jump technique. The aim of the study is to investigate the correlation (r) between kinematic and kinetic parameters of the jump from the Unsu Kata. These parameters were identified during the initial phase of the jump (performance indicators), and critical elements were detected during the final phase of the jump (error indicators). The study involved an athlete with the Kata specialty. A six-camera opto-electronic system and two force platforms were used. Statistical correlation was determined between performance indicators and error indicators. The analysis and interpretation of the data reveal that contributions of the forces (ground reaction force and torque) are the most influential parameters on the other variables, which are involved in the evaluation of the jump during its final phase. It appears that the search for the adequate balance between the force components during the take-off phase, in particular the effects of the forces generated by the torque of the limbs on the body, can be considered as one of the most influential conditions for the success of the jump. The performed analysis of the only participant of the study and the complexity of the technique constitute a starting point for a future study.