不同層級大專劍道選手面部打擊動作比較分析

研究目的：探討不同層級的大專劍道選手在打擊面部動作過程的差異。方法：研究對象為大專甲組劍道選手、乙組劍道選手各八名的健康男性劍道選手，使用10臺Vicon motion system MX紅外線高速攝影機擷取參數。資料處裡以Nexus軟體分析選手上舉期的運動學參數，使用無母數獨立樣本曼－惠特尼U考驗（Mann-Whitney U Test）來進行統計分析，顯著水準設為α = .05。結果：甲組有較短的打擊時間及較快的劍尖速度，而重心的上下位移甲組小於乙組。上肢關節角度部分，甲組在左右手的肩關節有較大的前屈角度，在腕關節部分乙組選手有較大的角度。下肢關節部分，甲組選手會有較大的髖關節伸展角度，而乙組在膝關節的屈曲角度大於甲組。結論：甲組選手在竹劍上舉時能以較小的腕、肘關節變化角度且肩關節能以較大的前屈角度來做打擊，因此會有較短的揮擊軌跡，這樣不僅可以縮短打擊的距離更可以減少攻擊的時間。

關鍵字

面部打擊；關節角度

並列摘要

Purpose: Investigate the kinematic differences between two levels of university male kendoka in men attack. Methods: Eight collegiate 1st level (First) kendoka and eight collegiate 2nd level kendoka (Second) participated in this study. (1st level kendoka: 21.5 ± 1.2 years, 171.0 ± 4.0 cm, 67.5 ± 11.9 kg; 2nd level kendoka: 21.1 ± 4.0 years, 173.6 ± 11.9 cm, 68.5 ± 2.1 kg). A 3D ten cameras motion analysis system (Vicon MX13^+) were used to collect human kinematic data. Vicon Nexus software was used to analyze the kinematic of kendoka during men attack. The Mann-Whitney U Test was to test the difference between two groups. Significant level was set at α = .05 in study. Results: First exhibited short attack time and faster attack velocity, and smaller vertical displacement center of mass (COM) displacement than Second. The First have greater shoulder flexion angle but smaller wrist radial deviation angle than the Second at hold up phase. In the lower limbs, First have a greater hip flexion angle than the Second, but the Second have a greater knee flextion angle at hold up phase. Conclusion: First utilized greater shoulder flextion and minor wrist flextion angle to attack in the Shinai hold up. Therefore it has short attack orbit, that can reducing distance and total time of attack.