Marín P J, Hazell T J, García-Gutiérrez M T, Cochrane D J
Laboratory of Physiology, European University Miguel de Cervantes, Valladolid, Spain.
J Musculoskelet Neuronal Interact. 2014 Mar;14(1):58-67.
To examine the post-exercise cross-transfer effects of acute whole body vibration (WBV).
Seventeen healthy male volunteers (20.8 ± 1.2 y) performed three unilateral vibration conditions in a randomized order: 1) WBV-50 Hz [high amplitude]; 2) WBV-30 Hz [low amplitude]; and 3) a control no WBV condition (Sham) applied to the dominant leg. Each condition involved maximal voluntary isometric contractions (MVC) followed by three leg press explosive repetitions (40% MVC) with non-dominant and dominant legs; which were conducted prior to and post vibration (immediately; 2 min and 5 min). Surface electromygraphy (sEMG) of the vastus lateralis (VL) and medial gastrocnemius (MG) were measured throughout each condition.
A condition x leg x time interaction effect was detected (p=0.001) where 50 Hz-High in the stimulated leg enhanced mean velocity at post-2 min compared to 30 Hz-Low and Sham, remaining elevated at post-5 min. Similarly, 50 Hz-High in the non-stimulated leg increased mean velocity at post-immediately and post-2 min compared to 30 Hz-Low and Sham. There were no changes in sEMG of VL and GM in the stimulated and non-stimulated post-conditions.
WBV (50 Hz) can augment cross-transfer in neuromuscular performance. WBV could provide an alternate method of unilateral training to promote cross education explosive strength.
研究急性全身振动（WBV）运动后的交叉转移效应。
17名健康男性志愿者（20.8±1.2岁）以随机顺序进行三种单侧振动条件：1）50Hz-WBV[高振幅]；2）30Hz-WBV[低振幅]；3）对优势腿施加无WBV的对照条件（假刺激）。每种条件都包括最大自主等长收缩（MVC），然后用非优势腿和优势腿进行三次腿举爆发性重复动作（40%MVC）；这些动作在振动前和振动后（立即；2分钟和5分钟）进行。在每种条件下全程测量股外侧肌（VL）和腓肠肌内侧头（MG）的表面肌电图（sEMG）。
检测到条件×腿×时间的交互作用效应（p = 0.001），与30Hz-低振幅和假刺激相比，刺激腿的50Hz-高振幅在2分钟后提高了平均速度，并在5分钟后保持升高。同样，与30Hz-低振幅和假刺激相比，非刺激腿的50Hz-高振幅在立即后和2分钟后提高了平均速度。在刺激和非刺激后的条件下，VL和GM的sEMG没有变化。
WBV（50Hz）可增强神经肌肉性能的交叉转移。WBV可为促进交叉训练爆发力提供一种单侧训练的替代方法。
