羽球不同正拍切球動作之運動學分析

Abstract

摘要

羽球運動在新賽制執行後，增加許多爆發力的訓練，來加強攻擊的力道，而為了要在短時間做最有效的攻擊，在攻擊前必須配合切球來迫使對手移位，創造更好的攻擊機會；然而正拍切球可分為一般的切球(正拍切球)與滑拍切球，本研究目的主要在比較八位男子甲組羽球選手正拍切球與滑拍切球在運動學上的差異。方法：利用八台Vicon Motion T20s System紅外線攝影機(300Hz)擷取受試者的運動學訊號，並經由Visual 3D軟體運算出運動學參數，透過運動學參數了解正拍與滑拍的動作差異，並將殺球作為效標，探討動作的隱蔽性。所有參數均透過SPSS 20.0版統計套裝軟體計算，以無母數弗里曼二因子變異數分析來檢定三種動作的差異，顯著水準定為α= .05。研究結果發現：正拍切球與滑拍切球在擊球過程中，動作最大的不同之處，是滑拍切球在擊球瞬間前臂內旋的角度較大(正拍切球：63.37度；滑拍切球：64.53度)以及前臂內旋角速度較快(正拍切球：每秒195.08度；滑拍切球：每秒224.39度)，造成擊球瞬間拍面與矢狀面的角度(正拍切球：4.02度；滑拍切球：14.93度)有明顯的差異。本研究從運動學參數的差異來看，無法判斷何者切球與殺球動作較具隱蔽性。

Abstract

The purpose of this study was to compare the kinematics variables of badminton forehand regular drop shot and reverse slice drop shots. The participants were eight elite male players (ages: 24 ± 4 years; height: 176 ± 8 cm; weight: 74 ± 8 kg). Eight Vicon Motion T20s System cameras (300Hz) were used to record the 3D kinematic data, which were later computed by Visual 3D software. All the variables were tested by Friedman two-way analysis of variance nonparametric statistical test designed by SPSS 20.0. Moreover, a post-hoc comparison was done with the significant level at α = .05. The results showed that the significant differences between forehand and reverse slice drop shots was that reverse slice drop shot performed larger forearm pronation angle at the contact (forehand drop shot ：63.37 deg； reverse slice drop shot：64.53 deg) and exerted faster angular velocity as well (forehand drop shot 195.08 deg/s, side drop shot 224.39 deg/s). Consequently, the two drop shots displayed a significant difference in their racket pan angles (forehand drop shot 4.02 deg, slice drop shot 14.93 deg) at contact point. In conclusion, from the perspective of kinematics variables can’t make out hidden form reverse slice drop shots or forehand drop shot.