Neuromuscular Research Laboratory, Schulthess Clinic, Lengghalde 2, 8008 Zurich, Switzerland.
Eur J Appl Physiol. 2013 Jun;113(6):1625-34. doi: 10.1007/s00421-013-2590-2. Epub 2013 Jan 24.
The aim of this study was to examine the magnitude and the origin of neuromuscular fatigue induced by half-squat static whole-body vibration (WBV) exercise, and to compare it to a non-WBV condition. Nine healthy volunteers completed two fatiguing protocols (WBV and non-WBV, randomly presented) consisting of five 1-min bouts of static half-squat exercise with a load corresponding to 50 % of their individual body mass. Neuromuscular fatigue of knee and ankle muscles was investigated before and immediately after each fatiguing protocol. The main outcomes were maximal voluntary contraction (MVC) torque, voluntary activation, and doublet peak torque. Knee extensor MVC torque decreased significantly (P < 0.01) and to the same extent after WBV (-23 %) and non-WBV (-25 %), while knee flexor, plantar flexor, and dorsiflexor MVC torque was not affected by the treatments. Voluntary activation of knee extensor and plantar flexor muscles was unaffected by the two fatiguing protocols. Doublet peak torque decreased significantly and to a similar extent following WBV and non-WBV exercise, for both knee extensors (-25 %; P < 0.01) and plantar flexors (-7 %; P < 0.05). WBV exercise with additional load did not accentuate fatigue and did not change its causative factors compared to non-WBV half-squat resistive exercise in recreationally active subjects.
本研究旨在探究半蹲静态全身振动（WBV）运动引起的神经肌肉疲劳的程度和来源，并将其与非 WBV 条件进行比较。9 名健康志愿者完成了两项疲劳协议（WBV 和非 WBV，随机呈现），包括 5 分钟的 1 分钟静态半蹲运动，负荷相当于他们个体体重的 50%。在每个疲劳协议前后，研究人员都对膝关节和踝关节肌肉的神经肌肉疲劳进行了调查。主要结果是最大自主收缩（MVC）扭矩、自愿激活和双重峰值扭矩。WBV 后（-23%）和非 WBV 后（-25%），膝关节伸肌 MVC 扭矩显著下降（P < 0.01），且下降程度相同，而膝关节屈肌、跖屈肌和背屈肌 MVC 扭矩不受处理影响。两种疲劳协议均不影响膝关节伸肌和跖屈肌的自愿激活。在 WBV 和非 WBV 运动后，双重峰值扭矩都显著下降，且下降程度相似，对于膝关节伸肌（-25%；P < 0.01）和跖屈肌（-7%；P < 0.05）都是如此。与非 WBV 半蹲抗阻运动相比，在娱乐性活跃的受试者中，附加负荷的 WBV 运动并没有加重疲劳，也没有改变其致病因素。
