| Effect of vibration training in maximal effort (70% 1RM) dynamic bicep curls. | |
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MedLine Citation:
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PMID: 17473779 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Kieran Moran; Brian McNamara; Jin Luo |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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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:
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Created Date: 2007-05-02 Completed Date: 2007-06-14 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
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Languages: eng Pagination: 526-33 Citation Subset: IM; S |
Affiliation:
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School of Health and Human Performance, Dublin City University, Dublin, Ireland. Kieran.Moran@dcu.ie |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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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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