Document Detail


Resistance exercise training enhances sympathetic nerve activity during fatigue-inducing isometric handgrip trials.
MedLine Citation:
PMID:  18941773     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Muscle sympathetic nerve activity (MSNA) was investigated 1 week before (pre-training), 1 week after, and 4-6 weeks after strength training using fatigue-inducing handgrip exercises and post-exercise forearm occlusion. Eighteen volunteers underwent forearm training, which consisted of 30 maximal effort, 10-s-duration static handgrips, 4 days per week for 4 weeks. A second group of 18 volunteers served as a control. MSNA was recorded from the tibial nerve by microneurography. Maximal handgrip force increased at 1 week post-training. The MSNA response during fatigued handgrip also increased at 1 week post-training, as compared to pre-training (52.6 +/- 5.8 vs. 40.6 +/- 4.4 bursts min(-1) (mean +/- SEM), respectively). However, at 4 weeks post-training, MSNA activity returned to the pre-training level (44.0 +/- 5.2 bursts min(-1); p < 0.0001 by ANOVA), while the control group showed no changes throughout this period. The MSNA response during post-exercise forearm occlusion was constant throughout the experiment in both groups. Our results indicate that an increased MSNA response after strength training is likely to be the result of central neural factors rather than the muscle metaboreflex.
Authors:
Mitsuru Saito; Satoshi Iwase; Tesshin Hachiya
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Publication Detail:
Type:  Journal Article     Date:  2008-10-22
Journal Detail:
Title:  European journal of applied physiology     Volume:  105     ISSN:  1439-6327     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2009-01-09     Completed Date:  2009-03-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  225-34     Citation Subset:  IM    
Affiliation:
Applied Physiology Laboratory, Toyota Technological Institute, 2-12 Hisakata Tmpaku-ku, Nagoya 468-8511, Japan. msaito@toyota-ti.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Biological / physiology*
Blood Pressure / physiology
Exercise Test
Exercise Tolerance
Hand Strength / physiology*
Heart Rate / physiology
Humans
Ischemia / metabolism
Isometric Contraction / physiology
Muscle Fatigue / physiology*
Muscle Fibers, Skeletal / physiology
Oxygen Consumption / physiology
Physical Fitness / physiology
Resistance Training*
Sympathetic Nervous System / physiology*
Tibial Nerve / physiology
Young Adult

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


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