Rønnestad Bent R, Slettaløkken Gunnar, Ellefsen Stian
J Strength Cond Res. 2016 Apr;30(4):1021-6.
The phenomenon postactivation potentiation can possibly be used to acutely improve sprint performance. The purpose of this study was to investigate the effect of body-loaded half-squats with added whole body vibration (WBV) on subsequent 20 m on-ice sprint performance. Fifteen male ice-hockey players performed 4 test sessions on separate days and in a randomized order. Two of this test sessions were with WBV and 2 were with noWBV and the best sprint time was used to determine effectiveness. Each test session included preconditioning 30 seconds half-squat exercise, 2 of which were supplemented with 50 Hz WBV at a amplitude of 3 mm. One minute after the cessation of the preconditioning exercise, the 20 m sprint test was performed. Intermediate time was sampled after 10 m. Preconditioning exercise performed with 50 Hz WBV resulted in superior 10 m and 20 m sprint performance compared to preconditioning exercise performed without WBV (1.84 6 0.10 seconds vs. 1.89 6 0.10 seconds and 3.14 6 0.13 vs. 3.17 6 0.13 seconds, respectively, p # 0.01). There was no difference between the protocols in perceived well-being of the legs before the warm-up or after the warm up (p = 0.3). However, there was an improved well-being in the legs immediately after the preconditioning exercise with WBV (p , 0.05). In conclusion, preconditioning exercise performed with WBV at 50 Hz seems to enhance on-ice sprint performance in ice-hockey players. This suggests that coaches can incorporate such exercise into the preparation to specific sprint training to improve the quality of the training.
激活后增强现象可能可用于急性改善短跑成绩。本研究的目的是调查负重半蹲结合全身振动（WBV）对随后20米冰上短跑成绩的影响。15名男性冰球运动员在不同日期以随机顺序进行了4次测试。其中2次测试使用WBV，2次不使用WBV，以最佳短跑时间来确定有效性。每次测试包括30秒的预适应半蹲练习，其中2次补充了频率为50赫兹、振幅为3毫米的WBV。预适应练习停止1分钟后，进行20米短跑测试。在10米处采集中间时间。与不使用WBV的预适应练习相比，使用50赫兹WBV进行的预适应练习在10米和20米短跑成绩上更优（分别为1.84±0.10秒对1.89±0.10秒和3.14±0.13秒对3.17±0.13秒，p≤0.01）。在热身前或热身后腿的主观感受方面，各方案之间没有差异（p = 0.3）。然而，在使用WBV进行预适应练习后，腿部的主观感受立即得到改善（p＜0.05）。总之，以50赫兹的WBV进行预适应练习似乎能提高冰球运动员的冰上短跑成绩。这表明教练可以将此类练习纳入特定短跑训练的准备中，以提高训练质量。
