Document Detail

Neural and muscular adjustments following repeated running sprints.
MedLine Citation:
PMID:  20358218     Owner:  NLM     Status:  MEDLINE    
This study aimed to reveal the neural and muscular adjustments following a repeated-sprint (RS) running exercise. Sixteen subjects performed a series of neuromuscular tests before, immediately after and 30 min (passive recovery) post-RS exercise (12 x 40 m sprints interspaced by 30 s of passive recovery). Sprint times significantly lengthened over repetitions (+17% from the first to the last sprint; P < 0.05). After RS running exercise, maximal voluntary contraction torque of the plantar flexors (-11 +/- 7.3%), muscle activation (twitch interpolation) (-2.7 +/- 3.4%) and soleus maximal M-wave amplitude (-20 +/- 17%) were significantly (P < 0.05) reduced but returned close to baseline after 30 min. Both soleus EMG activity and maximal Hoffmann reflex normalized with respect to M-wave amplitude did not change during the whole experiment. From pre- to post-RS exercise, evoked twitch response was characterized by lower peak torque and maximal rate of torque development (-13 and -11%, respectively, P < 0.05), but was not different from baseline after recovery. Peak tetanus at 20 and 80 Hz were 17 and 8% lower (P < 0.05) in the fatigued state, respectively. Acute muscle fatigue induced by RS running exercise is mainly peripheral as the short-term (30 min) recovery pattern of plantar flexors contractile properties follows that of the voluntary force-generating capacity.
Stéphane Perrey; Sébastien Racinais; Khaled Saimouaa; Olivier Girard
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Publication Detail:
Type:  Journal Article     Date:  2010-04-01
Journal Detail:
Title:  European journal of applied physiology     Volume:  109     ISSN:  1439-6327     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-23     Completed Date:  2010-11-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1027-36     Citation Subset:  IM    
Laboratoire EA 2991 Efficience et Déficience Motrices, UFR STAPS, Faculté des Sciences du Sports, Université Montpellier 1, 700 Avenue du Pic Saint Loup, 34090, Montpellier, France.
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MeSH Terms
Adaptation, Physiological / physiology
Muscle Contraction / physiology*
Muscle Fatigue / physiology*
Muscle, Skeletal / innervation,  physiology*
Physical Exertion / physiology*
Reflex, Stretch / physiology*
Running / physiology*

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