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Title: Effect of whole-body vibration on neuromuscular activation of leg muscles during dynamic exercises in individuals with stroke
Authors: Liao, LR
Pang, MYC 
Issue Date: Jul-2017
Source: Journal of strength and conditioning research, July 2017, v. 31, no. 7, p. 1954-1962
Abstract: This study examined the leg muscle activity during exposure to different whole-body vibration (WBV) intensities while performing various dynamic exercises in patients with chronic stroke. Thirty patients with chronic stroke performed a series of dynamic exercises under 3 conditions: (a) low-intensity WBV (peak acceleration: 0.96 units of gravity of Earth [g]), (b) high-intensity WBV (1.61 g), and (C) no WBV. Neuromuscular activation was recorded with surface electromyography (EMG) on bilateral biceps femoris (BF), vastus lateralis, tibialis anterior (TA), and gastrocnemius (GS) in both legs and was reported as EMG(rms) (root mean square) normalized to % maximal voluntary contraction. The EMG amplitude of all tested muscles was significantly increased by adding WBV during dynamic exercise (p # 0.05). The EMG amplitude of BF, TA, and GS during exposure to high-intensity WBV was significantly greater than low-intensity WBV (p <= 0.05). The increase in EMG amplitude caused by WBV was exercise dependent in GS and TA (p <= 0.05). The EMG response to WBV in GS and BF in the affected leg was significantly greater than the corresponding muscles in the unaffected leg (p <= 0.05). The extent of WBV-induced muscle activity was dependent on the dynamic exercise, WBV intensity, and muscle trained among patients with chronic stroke.
Keywords: Cerebrovascular accident
Electromyography
Rehabilitation
Publisher: Lippincott Williams & Wilkins
Journal: Journal of strength and conditioning research 
ISSN: 1064-8011
EISSN: 1533-4287
DOI: 10.1519/JSC.0000000000001761
Rights: © 2016 National Strength and Conditioning Association
This is the Author’s Original Manuscript of an article published in final form in Liao, L. R., & Pang, M. Y. C. (2017). Effect of whole-body vibration on neuromuscular activation of leg muscles during dynamic exercises in individuals with stroke. The Journal of Strength & Conditioning Research, 31(7), 1954-1962, available online: https://doi.org/10.1519/JSC.0000000000001761.
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