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Title: Acute whole-body vibration does not facilitate peak torque and stretch reflex in healthy adults
Authors: Yeung, EW 
Lau, CC
Kwong, APK
Sze, YM
Zhang, WY
Yeung, SS 
Keywords: Acute whole body vibration
Neuromuscular performance
Peak torque
Stretch reflex
Issue Date: 2014
Publisher: Journal of Sport Science and Medicine
Source: Journal of sports science and medicine, 2014, v. 13, no. 1, p. 30-35 How to cite?
Journal: Journal of sports science and medicine 
Abstract: The acute effect of whole-body vibration (WBV) training may enhance muscular performance via neural potentiation of the stretch reflex. The purpose of this study was to investigate if acute WBV exposure affects the stretch induced knee jerk reflex [onset latency and electromechanical delay (EMD)] and the isokinetic knee extensor peak torque performance. Twenty-two subjects were randomly assigned to the intervention or control group. The intervention group received WBV in a semi-squat position at 30° knee flexion with an amplitude of 0.69 mm, frequency of 45 Hz, and peak acceleration of 27.6 m/s2 for 3 minutes. The control group underwent the same semii-squatting position statically without exposure of WBV. Two-way mixed repeated measures analysis of variance revealed no significant group effects differences on reflex latency of rectus femoris (RF) and vastus lateralis (VL; p = 0.934 and 0.935, respectively) EMD of RF and VL (p = 0.474 and 0.551, respectively) and peak torque production (p = 0.483) measured before and after the WBV. The results of this study indicate that a single session of WBV exposure has no potentiation effect on the stretch induced reflex and peak torque performance in healthy young adults.
ISSN: 1303-2968
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