【論文摘要】Effect of Fatigue on Performance of Double Roundhouse Kicks in Taekwondo Athletes

【論文摘要】疲乏對跆拳道運動員二連踢表現的影響

張譽馨(Yu-Xin Zhang) ； 張耀宗(Yao-Zong Chang) ； 陳繪亘(Huei-Syuan Chen) ； 楊文傑(Wen-Chieh Yang)

《物理治療》 47卷4期 (2022/12) Pp. 300-301

https://doi.org/10.6215/FJPT.202212.P02

摘要

Background and Purpose: In Taekwondo (TKD), roundhouse kick is the most used skill. Double kicks increase the chance of scoring despite high demand for strength and power. Fatigue during competition is likely to affect the performance of double kicks. Therefore, this study aims to investigate the effect of fatigue on the performance of double roundhouse kicks in TKD athletes. Methods: Sixteen TKD athletes underwent a simulated game test, which included three 2-minute rounds, with a 1-minute inter-round break. In each round, participants were asked to conduct 32 roundhouse kicks (16 single and 16 double) according to the displayed instructions. Bilateral hip and knee angles were measured using 6 inertial measurement units placed over lower thorax, sacrum, bilateral thighs, and bilateral legs. In double kicks, each kick was divided into a chambering phase (from the kicking leg take off to maximum knee flexion) and the attacking phase (from maximum knee flexion to target impact). ANOVA with repeated measures was used to investigate the effect of fatigue (round 1, 2, and 3) on the duration of phases. Results: Regarding chambering phase, duration in the first kick in round 3 (0.37 ± 0.14 s) was significantly longer than that in round 1 (0.31 ± 0.12 s) and round 2 (0.33 ± 0.11 s); duration in the second kick showed no significant difference in round 1 (0.26 ± 0.17 s), round 2 (0.29 ± 0.19 s), and round 3 (0.30 ± 0.21 s). Regarding attacking phase, duration in the first kick showed no significant difference in round 1 (0.06 ± 0.02 s), round 2 (0.07 ± 0.02 s), and round 3 (0.06 ± 0.03 s); duration in the second kick showed no significant difference in round 1 (0.11 ± 0.05 s), round 2 (0.13 ± 0.06 s), and round 3 (0.12 ± 0.06 s) neither. Conclusion: In double kicks, the first chambering phase featuring a quick raise of the kicking leg, was substantially slowed down in the last round. This might result from the fatigue of hip muscles. Clinical Relevance: Prolonged chambering phase makes the kicking less efficient and vulnerable to the opponent's counterattack.