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振动诱导的运动单位同步是否能增强最大自主等长收缩力？一项随机对照双盲试验。

Does the motor unit synchronization induced by vibration enhance maximal voluntary isometric contraction force? A randomized controlled double-blind trial.

作者信息

Kara Seher, Karacan Ilhan, Cidem Muharrem, Gokmen Emel Saglam, Karamehmetoğlu Safak S

机构信息

Department of Physical Medicine and Rehabilitation, Bagcilar Training and Research Hospital, Istanbul, Turkey.

出版信息

J Musculoskelet Neuronal Interact. 2018 Sep 1;18(3):339-347.

PMID:30179211
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6146196/
Abstract

OBJECTIVES

Motor unit synchronization has been proposed as a potential mechanism underlying muscle strength gains for vibration training, but it has yet to be definitely demonstrated. Aim of this study was to determine whether motor unit synchronization induced by vibration has an effect on isometric muscle strength.

METHODS

Thirty-six healthy volunteers were randomized into two groups: the vibration and the control (sham vibration) groups. Two sets of test measurements and vibration resistance training between the two sets were applied to the right wrist flexors. The maximal voluntary isometric contraction force, and flexor carpi radialis EMG activity were recorded in the first (without vibratory stimulation) and the second (with vibratory stimulation) set.

RESULTS

There was no difference in the normalized peak force between the first and the second set in the vibration group (p=0.554). Motor units fired with maximal voluntary isometric contraction synchronized at the vibration frequency (25 Hz) during vibration in all participants of the vibration group.

CONCLUSION

The present study indicates that vibration-induced motor unit synchronization does not have a significant effect on the maximal voluntary isometric contraction force.​.

摘要

目的

运动单位同步化被认为是振动训练增强肌肉力量的潜在机制，但尚未得到确切证实。本研究的目的是确定振动诱导的运动单位同步化是否对等长肌肉力量有影响。

方法

36名健康志愿者被随机分为两组：振动组和对照组（假振动组）。对右侧腕屈肌进行两组测试测量，并在两组之间进行抗阻振动训练。在第一组（无振动刺激）和第二组（有振动刺激）中记录最大自主等长收缩力和桡侧腕屈肌肌电图活动。

结果

振动组第一组和第二组之间的标准化峰值力无差异（p = 0.554）。振动组的所有参与者在振动期间，最大自主等长收缩时发放冲动的运动单位在振动频率（25Hz）下同步。

结论

本研究表明，振动诱导的运动单位同步化对最大自主等长收缩力没有显著影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/a7945c0258e7/JMNI-18-339-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/226bc50ca18c/JMNI-18-339-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/fd69be1d6734/JMNI-18-339-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/1e891b1e4927/JMNI-18-339-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/55c0e45dff6a/JMNI-18-339-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/a7945c0258e7/JMNI-18-339-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/226bc50ca18c/JMNI-18-339-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/fd69be1d6734/JMNI-18-339-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/1e891b1e4927/JMNI-18-339-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/55c0e45dff6a/JMNI-18-339-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d243/6146196/a7945c0258e7/JMNI-18-339-g005.jpg

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