Jackson Kurt J, Merriman Harold L, Vanderburgh Paul M, Brahler C Jayne
Department of Health and Sports Science, University of Dayton, Dayton, Ohio, USA.
J Neurol Phys Ther. 2008 Dec;32(4):171-6. doi: 10.1097/NPT.0b013e31818ee760.
Whole-body vibration (WBV) is a relatively new form of exercise training that may influence muscle performance. This study investigated the acute effects of high- (26 Hz) and low- (2 Hz) frequency WBV on isometric muscle torque of the quadriceps and hamstrings in persons with multiple sclerosis.
Fifteen individuals (mean age = 54.6 years, SD = 9.6) with multiple sclerosis and Expanded Disability Status Scale scores ranging from 0 to 6.5 (mean = 4.2, SD = 2.3) participated in this randomized, crossover study. After baseline measures of isometric quadriceps and hamstring muscle torque, subjects were exposed to 30 seconds of WBV at either 2 or 26 Hz. Torque values were measured again at one, 10, and 20 minutes after vibration. Subjects returned one week later to repeat the same protocol at the alternate vibration frequency.
There were no significant differences in isometric torque production between the 2- and 26-Hz WBV conditions. There was also no significant difference between baseline torque values and those measured at one, 10, and 20 minutes after either vibration exposure. However, there was a consistent trend of higher torque values after the 26-Hz WBV when compared with the 2-Hz condition for both quadriceps and hamstring muscles.
Although not statistically significant, peak torque values for both quadriceps and hamstring muscles were consistently higher after 30 seconds of WBV at 26 vs 2 Hz. Whether WBV presents a viable treatment option as either a warm-up activity or a long-term exercise intervention is yet to be determined. Future studies should include a wider variety of WBV parameters and the use of functional outcome measures.
全身振动（WBV）是一种相对较新的运动训练形式，可能会影响肌肉性能。本研究调查了高频率（26赫兹）和低频率（2赫兹）全身振动对多发性硬化症患者股四头肌和腘绳肌等长肌肉扭矩的急性影响。
15名患有多发性硬化症的个体（平均年龄 = 54.6岁，标准差 = 9.6）参与了这项随机交叉研究，其扩展残疾状态量表评分范围为0至6.5（平均 = 4.2，标准差 = 2.3）。在对股四头肌和腘绳肌等长肌肉扭矩进行基线测量后，受试者分别接受2赫兹或26赫兹的全身振动30秒。在振动后1分钟、10分钟和20分钟再次测量扭矩值。受试者一周后返回，以交替的振动频率重复相同的方案。
2赫兹和26赫兹全身振动条件下的等长扭矩产生没有显著差异。在任何一种振动暴露后，基线扭矩值与在1分钟、10分钟和20分钟时测量的扭矩值之间也没有显著差异。然而，与2赫兹条件相比，26赫兹全身振动后，股四头肌和腘绳肌的扭矩值始终呈现出更高的趋势。
尽管在统计学上不显著，但在26赫兹而非2赫兹进行30秒全身振动后，股四头肌和腘绳肌的峰值扭矩值始终更高。全身振动作为热身活动或长期运动干预是否是一种可行的治疗选择还有待确定。未来的研究应包括更广泛的全身振动参数以及功能结局指标的使用。
