Document Detail


Effect of vibration training in maximal effort (70% 1RM) dynamic bicep curls.
MedLine Citation:
PMID:  17473779     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: To examine (i) the acute effect of direct vibration on neuromuscular performance with a maximal-effort dynamic resistance exercise and (ii) the acute residual effect of direct vibration training both with and without the resistance exercise. METHODS: Fourteen subjects were exposed to four training conditions in random order: exercise with vibration (E + V); exercise with sham vibration (E + SV); no exercise with vibration (NE + V); and no exercise with sham vibration (NE + SV). The exercise comprised three sets of maximal-effort bicep curls with a load of 70% 1RM. A portable vibrator was strapped onto the skin over the bicep tendon to apply vibration with an amplitude and frequency of 1.2 mm and 65 Hz. Elbow joint angle and bicep EMG were measured both during training and in pre- and posttraining tests. Angular velocity, moment, power, and bicep root mean squared value of EMG (EMG(rms)) and mean power frequency of EMG (EMG(mpf)) were determined for the concentric phase. Interday reliability ranged from 0.69 to 0.99. RESULTS: During training (acute effect) vibration did not enhance mean angular velocity (1.5 vs 1.5 rad.s(-1), P = 0.86), peak angular velocity (2.7 vs 2.7 rad.s(-1), P = 0.90), mean moment (27.3 vs 27.4 N.m, P = 0.83), peak moment (39.8 vs 39.4 N.m, P = 0.53), mean power (40.3 vs 41.1 W, P = 0.72), peak power (91.9 vs 90.2 W, P = 0.77), or bicep EMG(rms) (73.9 vs 71.9, P = 0.78). Similarly, after training (acute residual effect) there was no enhancement from vibration in the mechanical and EMG output when the muscle was trained or was rested (P > 0.05). CONCLUSION: These findings suggest that direct vibration, with an amplitude of 1.2 mm and frequency of 65 Hz, applied to the bicep muscle tendon, does not enhance neuromuscular performance in maximal-effort contractions during or immediately after training.
Authors:
Kieran Moran; Brian McNamara; Jin Luo
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  39     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2007 Mar 
Date Detail:
Created Date:  2007-05-02     Completed Date:  2007-06-14     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  526-33     Citation Subset:  IM; S    
Affiliation:
School of Health and Human Performance, Dublin City University, Dublin, Ireland. Kieran.Moran@dcu.ie
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MeSH Terms
Descriptor/Qualifier:
Adult
Arm / physiology*
Biomechanics
Electromyography
Exercise / physiology*
Humans
Isometric Contraction / physiology*
Male
Muscle, Skeletal / physiology*
Musculoskeletal Manipulations
Physical Endurance / physiology*
Physical Exertion*
Prospective Studies
Time Factors
Torque
Vibration / adverse effects*
Weight Lifting / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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