| Vitamin and mineral supplementation and neuromuscular recovery after a running race. | |
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MedLine Citation:
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PMID: 17146317 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: This double-blind study investigated the effects of vitamin and mineral complex supplementation on the neuromuscular function of the knee-extensor muscles after a prolonged trail running race. METHODS: Twenty-two well-trained endurance runners took either placebo (Pl group) or vitamins and minerals (Vm group) for 21 d before the race and for 2 d after the race. Maximal voluntary contractions (MVC) and surface EMG activity of the vastus lateralis (VL) muscle were recorded before (pre) and 1 h (post), 24 h (post 24) and 48 h (post 48) after the race. Central activation ratio (CAR), neural (M-wave), and contractile (muscular twitch) properties of the quadriceps muscles were analyzed using electrical stimulation techniques. RESULTS: The knee-extensor MVC was significantly (P < 0.01) reduced after exercise for both groups (Vm: 36.5 +/- 3.0 %; Pl: 36.9 +/- 2.1%), but MVC recovery was greater for Vm than Pl after 48 h (11%, P < 0.05). The reduced MVC after exercise was associated with a significant reduction in maximal EMG normalized to the M-wave in VL muscle and in CAR for both groups. Characteristics of the muscular twitch were not significantly altered for either groups, whereas M-wave duration increased significantly (P < 0.05) after exercise. CONCLUSIONS: The reduction of MVC immediately after the race appeared to result from peripheral mechanisms such as a failure in muscle membrane excitation and, to a lesser extent, from reduced central activation. The cause of the depressed MVC 24 h after the race seemed to be located within the muscle itself. A dietary supplementation of a vitamin and mineral complex does not attenuate the loss of contractile function immediately after the running exercise, and it may accelerate the recovery of maximal force capacity. |
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Authors:
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Elodie Gauche; Romuald Lepers; Giuseppe Rabita; Jean-Michel Leveque; David Bishop; Jeanick Brisswalter; Christophe Hausswirth |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 38 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2006 Dec |
Date Detail:
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Created Date: 2006-12-05 Completed Date: 2007-01-30 Revised Date: - |
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: 2110-7 Citation Subset: IM; S |
Affiliation:
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Laboratory of Biomechanics and Physiology, National Institute of the Sport and Physical Education, Paris, France. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Dietary Supplements* Double-Blind Method Electromyography Humans Muscle Contraction / drug effects, physiology Muscle Strength / drug effects, physiology Recovery of Function / drug effects*, physiology Running / physiology* Trace Elements / pharmacology* Vitamins / pharmacology* |
| Chemical | |
Reg. No./Substance:
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0/Trace Elements; 0/Vitamins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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