Document Detail


Neural drive preservation after detraining following neuromuscular electrical stimulation training.
MedLine Citation:
PMID:  17027149     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of the study was to investigate the behaviour of the central nervous system when 5 weeks of neuromuscular electrical stimulation (NMES) training was followed by 5 weeks of detraining. Nineteen males were divided into the neuromuscular electrostimulated group (EG, n=12) and the control group (CG, n=7). The training program consisted of 15 sessions of isometric NMES over a 5-week period. The EG subjects were tested before training (PRE), after 5 weeks of NMES training (POST) and after 5 weeks of detraining (DE) while CG subjects were only tested at PRE and at POST. Soleus (SOL) and gastrocnemii (GAS) maximal H-reflex and M-wave potentials were evoked at rest (i.e., H(max) and M(max), respectively) and during maximal voluntary contraction (MVC) (i.e., H(sup) and M(sup), respectively). SOL and GAS V-wave were recorded by supramaximal stimulation delivered during MVC. SOL and GAS electromyographic (EMG) activity as well as muscle activation were also assessed during MVC. After training, plantar flexor MVC increased significantly by 22% (P<0.001). Torque gains were associated with an increase in muscle activation (P<0.05), SOL and GAS normalized EMG activity (P<0.01 and P<0.05, respectively) and V/M(sup) ratios (P<0.01 and P<0.05, respectively). No significant changes occurred in any of these parameters between POST and DE. H(max)/M(max) and H(sup)/M(sup) ratios for both muscles were unchanged after both the training and detraining periods. In conclusion, the NMES training-induced neural adaptations were maintained after detraining, suggesting that neural changes are long-lasting and did not affect the elements of H-reflex pathways.
Authors:
Julien Gondin; Julien Duclay; Alain Martin
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial     Date:  2006-10-05
Journal Detail:
Title:  Neuroscience letters     Volume:  409     ISSN:  0304-3940     ISO Abbreviation:  Neurosci. Lett.     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-11-06     Completed Date:  2007-01-04     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7600130     Medline TA:  Neurosci Lett     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  210-4     Citation Subset:  IM    
Affiliation:
INSERM ERM 207 Motricité Plasticité Laboratory, Faculty of Sport Sciences, BP 27877, University of Burgundy, 21078 Dijon Cedex, France. julien.gondin@u-bourgogne.fr
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological / physiology
Adult
Ankle Joint / physiology
Electric Stimulation / methods*
Evoked Potentials, Motor / physiology*
H-Reflex / physiology*
Humans
Male
Muscle Contraction / physiology*
Muscle, Skeletal / innervation,  physiology*
Neuronal Plasticity / physiology
Physical Exertion / physiology
Physical Fitness / physiology*
Time Factors

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


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