PDF(Pubmed)
Abstract：
The objectives of this study were to evaluate the acute effects of the sequence order of drop jumps (DJ) and dynamic stretching (DS) on sprinting performances in competitive athletes and to investigate the relationships between post-activation performance enhancement (PAPE) in sprint performance and lower limb power. Thirteen male jumpers and sprinters participated in this study (19 ± 2 years; 177 ± 7 cm; 71.7 ± 5.6 kg). Through a randomized crossover design, the athletes were exposed to three different conditions after a standardized warm-up: DS+DJ, DJ+DS, and control. Sprinting performance over 40 m was analysed with consideration of initial (0 to 20 m) and final acceleration (20 to 40 m) phases. The effect of intervention was examined by two-way repeated-measures of ANOVA. Pearson\'s correlation test was used to determine the association between PAPE during sprinting and jump performance. There was no effect of any factor on 40-m sprint performance. Meanwhile, the performance at 20-40 m was higher after the DS+DJ condition when compared to baseline (8.79 ± 0.43 vs. 8.91 ± 0.35 m/s; p = 0.015). However, the initial acceleration was worsened in the DJ+DS condition when compared to baseline (6.26 ± 0.25 vs. 6.22 ± 0.26 m/s; p = 0.002). There was a negative correlation between CMJ height and the improvement in final acceleration (r = -0.741; p = 0.004). The use of DS prior to DJ is an effective strategy to improve performance in the final acceleration phase (20-40 m). The athletes with lower levels of lower limb power benefited the most from this PAPE strategy.
摘要：
这项研究的目的是评估跳下（DJ）和动态拉伸（DS）的顺序顺序对竞技运动员短跑表现的急性影响，并研究激活后表现增强（PAPE）在短跑表现和下肢力量之间的关系。13名男性跳线和短跑选手参加了这项研究（19±2岁；177±7厘米；71.7±5.6千克）。通过随机交叉设计，运动员在标准化热身后暴露在三种不同的条件下：DS+DJ，DJ+DS,和控制。在考虑初始（0至20m）和最终加速（20至40m）阶段的情况下，分析了40m以上的冲刺性能。通过方差分析的双向重复测量检查干预的效果。Pearson的相关性检验用于确定短跑过程中PAPE与跳跃表现之间的关联。任何因素对40米冲刺表现都没有影响。同时,与基线相比，DS+DJ条件后20-40m的性能更高(8.79±0.43vs.8.91±0.35m/s；p=0.015）。然而,与基线相比，DJ+DS条件下的初始加速度恶化(6.26±0.25vs.6.22±0.26m/s；p=0.002）。CMJ高度与最终加速度的改善之间呈负相关（r=-0.741；p=0.004）。在DJ之前使用DS是提高最终加速阶段（20-40m）性能的有效策略。下肢力量水平较低的运动员从这种PAPE策略中受益最大。
