Is the Acute and Short-Term Effect of Whole-Body Vibration the Same on the H-Reflex Recruitment Curve and Agility?

2016 ◽  
Vol 25 (4) ◽  
pp. 348-356 ◽  
Author(s):  
Morteza Ahmadi ◽  
Giti Torkaman ◽  
Sedigheh Kahrizi ◽  
Mojdeh Ghabaee ◽  
Leila Dadashi Arani

Context:Despite the widespread use of whole-body vibration (WBV), especially in recent years, its neurophysiological mechanism is still unclear and it is yet to be determined whether acute and short-term WBV exposure produce neurogenic enhancement for agility.Objective:To compare the acute and short-term effects of WBV on the H-reflex-recruitment curve and agility.Design:Cross-over study.Setting:Clinical electrophysiology laboratory.Participants:20 nonathlete male volunteers (mean age 24.85 ± 3.03 y).Main Outcome Measures:Subjects were randomly divided into 2 groups, H-reflex and agility. In the sham protocol, subjects stood on the turned-off vibration plate while maintaining the semisquat position, and then, after a 2-wk washout, vibration-training sessions were performed in the same position with a frequency of 30 Hz and an amplitude of 3 mm. H-reflex-recruitment curve was recorded and the agility test of a shuttle run was performed before and after the first session and also 48 h after the 11th session in both sham and vibration-training protocols.Results:Acute effects of WBV training caused a significant decrease of threshold amplitude and H-max/M-max (P = .01 and P = .04, respectively). Short-term WBV training significantly decreased the threshold intensity of the soleus H-reflex-recruitment curve (P = .01) and caused a decrease and increase respectively, in the threshold intensity and the area under the recruitment curve.Conclusions:The results suggest an inhibitory effect of acute WBV training on the H-reflex response.

2014 ◽  
Vol 37 (2) ◽  
pp. 58-64 ◽  
Author(s):  
Taishi Tsuji ◽  
Naruki Kitano ◽  
Kenji Tsunoda ◽  
Erika Himori ◽  
Tomohiro Okura ◽  
...  

Obesity Facts ◽  
2010 ◽  
Vol 3 (2) ◽  
pp. 7-7 ◽  
Author(s):  
Dirk Vissers ◽  
An Verrijken ◽  
Ilse Mertens ◽  
Caroline Van Gils ◽  
Annemie Van de Sompel ◽  
...  

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