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      • Biomechanical Analysis of Hakdariseogi of the “Kumgang” Poomsae; A comparison between Elite and Non-Elite Taekwondo Athletes

        Mitra Beigi,Ensiyeh Karimi,Rasoul Abedi,Nooshin Kejani,Siamak Khorramymehr 국제무예학회 2024 International Journal of Martial Arts Vol.9 No.-

        Biomechanical assessment of Taekwondo athletes’ motion is essential to improve their performance. It is well known that balance tasks such as Hakdariseogi are determinant techniques which affect the result of a competition. So the aim of this study is to compare biomechanical variables of the support leg during Hakdariseogi task between elite and non-elite taekwondo athletes. Eighteen taekwondo athletes including ten elite and eight non-elite were participated. Six high-speed motion cameras and one force plate were used to acquire kinematics and kinetics data. MATLAB R2017b was used to plot support leg’s joints curves. Statistical analysis was performed to compare variables between two mentioned groups.The average of joints’ angles in the elite group was significantly more than non-elite group during the movement and balance phases (p<0.05).The amount of knee angular velocity in elite athletes was meaningfully higher than non-elite athletes during the movement phase (p<0.05). Also, the average amount of hip and ankle moments was greater in elite athletes during balance phase (p<0.05).There were no meaningful differences in other moment variables between elite and non-elite athletes (p>0.05).In some conditions, elites had more stability with greater angles and moments in the support leg’s joints. So they could perform Hakdariseogi task more quickly or in higher range of values than non-elite group and also generate more muscle activity due to the greater net joint moments, to create more joint moments for better control and stability, and neutralizing the external moments (such as ground reaction moments).

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