摘要
Objective： The purpose of this study was to compare the effects of various taekwondo kicks and age （school level） in absolute terms and relative body mass on the resultant linear acceleration （RLA） of an instrumented head form. Methods： Forty-eight male （middle school： 16; high school： 16; university： 16） taekwondo athletes were recruited for this study. Subjects performed 10 turning, 10 jump spinning hook, and 10 jump back kicks on a Hybrid II head mounted on a height-adjustable frame. Results： A 2-way （School x Kick） MANOVA was used to determine the differences in RLA between schools （age groups） by type of kick. There was no univariate School main effect for absolute RLA （η2 = 0.06） and RLA relative to body mass （η2 = 0.06）. No univariate Kick main effects were found for absolute （η2 = 0.06） and relative RLA （η2 = 0.06）. Conclusion： It is of concern that RLA did not significantly differ between school levels, implying that young taekwondo athletes generate similar forces to their adult counterparts, possibly exposing young athletes to an increased risk for head ir^iuries.
目的:比较不同跆拳道踢法和年龄(学生等级)在绝对值与相对身体质量方面对用模拟人头部装置所测得的合成线性加速度(RLA)的影响。方法:让48名男性跆拳道运动员(初中生、高中生、大学生各16名)对可调节高度的模拟人头部装置(HybridⅡ)完成转身踢、腾空旋踢、腾空后踢3种踢法,每种踢法各10次。结果:采用双因素(学生等级×踢法)多变量方差分析不同学生等级和踢法情况下RLA的差异。学生等级因素和踢法因素均未对RLA绝对值和(身体质量)相对值产生影响(η~2=0.06)。结论:不同学生等级间的RLA无显著差异,说明青少年跆拳道运动员产生的力量与成年运动员相似,可能导致青年运动员头部受伤风险增加。
