Effects of 4 Weeks Whole Body Vibration on Electromechanical Delay, Rate of Force Development, and Presynaptic Inhibition

2011 ◽  
Vol 43 (Suppl 1) ◽  
pp. 928 ◽  
Author(s):  
Junggi Hong ◽  
Kristof Kipp ◽  
Samuel T. Johnson ◽  
Mark A. Hoffman
Keyword(s):  
Presynaptic Inhibition ◽  
Whole Body Vibration ◽  
Rate Of Force Development ◽  
Whole Body ◽  
Electromechanical Delay ◽  
Body Vibration ◽  
Force Development

The Influence of Whole-Body Vibration on Rate of Force Development during an Isometric Clean Pull

2015 ◽  
Vol 47 ◽  
pp. 782
Author(s):  
Vanessa L. Cazas-Moreno ◽  
Harish Chander ◽  
Charles R. Allen ◽  
John C. Garner ◽  
Jacob R. Gdovin ◽  
...  
Keyword(s):  
Whole Body Vibration ◽  
Rate Of Force Development ◽  
Whole Body ◽  
Body Vibration ◽  
Force Development

Acute Effects of Whole-Body Vibration on Jump Force and Jump Rate of Force Development: A Comparative Study of Different Devices

2012 ◽  
Vol 26 (3) ◽  
pp. 691-696 ◽  
Author(s):  
Javad Bagheri ◽  
Rita J van den Berg-Emons ◽  
Johan J Pel ◽  
Herwin L Horemans ◽  
Henk J Stam
Keyword(s):  
Comparative Study ◽  
Whole Body Vibration ◽  
Rate Of Force Development ◽  
Whole Body ◽  
Acute Effects ◽  
Body Vibration ◽  
Force Development ◽  
Jump Rate

scholarly journals Effects of whole body vibration on motor unit recruitment and threshold

2012 ◽  
Vol 112 (3) ◽  
pp. 388-395 ◽  
Author(s):  
Ross D. Pollock ◽  
Roger C. Woledge ◽  
Finbarr C. Martin ◽  
Di J. Newham
Keyword(s):  
Phase Angle ◽  
Presynaptic Inhibition ◽  
Healthy Subjects ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Angle Distribution ◽  
Recruitment Threshold ◽  
Body Vibration ◽  
Single Motor Units ◽  
Before And After

Whole body vibration (WBV) has been suggested to elicit reflex muscle contractions but this has never been verified. We recorded from 32 single motor units (MU) in the vastus lateralis of 7 healthy subjects (34 ± 15.4 yr) during five 1-min bouts of WBV (30 Hz, 3 mm peak to peak), and the vibration waveform was also recorded. Recruitment thresholds were recorded from 38 MUs before and after WBV. The phase angle distribution of all MUs during WBV was nonuniform ( P < 0.001) and displayed a prominent peak phase angle of firing. There was a strong linear relationship ( r = −0.68, P < 0.001) between the change in recruitment threshold after WBV and average recruitment threshold; the lowest threshold MUs increased recruitment threshold ( P = 0.008) while reductions were observed in the higher threshold units ( P = 0.031). We investigated one possible cause of changed thresholds. Presynaptic inhibition in the soleus was measured in 8 healthy subjects (29 ± 4.6 yr). A total of 30 H-reflexes (stimulation intensity 30% Mmax) were recorded before and after WBV: 15 conditioned by prior stimulation (60 ms) of the antagonist and 15 unconditioned. There were no significant changes in the relationship between the conditioned and unconditioned responses. The consistent phase angle at which each MU fired during WBV indicates the presence of reflex muscle activity similar to the tonic vibration reflex. The varying response in high- and low-threshold MUs may be due to the different contributions of the mono- and polysynaptic pathways but not presynaptic inhibition.

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