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Effects of different pedalling techniques on muscle fatigue and mechanical efficiency during prolonged cycling.
MedLine Citation:
PMID:  21507064     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The present study aimed to test the influence of the pedalling technique on the occurrence of muscular fatigue and on the energetic demand during prolonged constant-load cycling exercise. Subjects performed two prolonged (45 min) cycling sessions at constant intensity (75% of maximal aerobic power). In a random order, participants cycled either with their preferred technique (PT) during one session or were helped by a visual force-feedback to modify their pedalling pattern during the other one (FB). Index of pedalling effectiveness was significantly (P<0.05) improved during FB (41.4±5.5%); compared with PT (36.6±4.1%). Prolonged cycling induced a significant reduction of maximal power output, which was greater after PT (-15±9%) than after FB (-7±12%). During steady-state FB, vastus lateralis muscle activity was significantly (P<0.05) reduced, whereas biceps femoris muscles activities increased compared with PT. Gross efficiency (GE) did not significantly differ between the two sessions, except during the first 15 min of exercise (FB: 19.0±1.9% vs PT: 20.2±1.9%). Although changes in muscular coordination pattern with feedback did not seem to influence GE, it could be mainly responsible for the reduction of muscle fatigue after prolonged cycling.
Authors:
J Theurel; M Crepin; M Foissac; J J Temprado
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-21
Journal Detail:
Title:  Scandinavian journal of medicine & science in sports     Volume:  -     ISSN:  1600-0838     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9111504     Medline TA:  Scand J Med Sci Sports     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2011 John Wiley & Sons A/S.
Affiliation:
Institute of Movement Sciences E-J Marey, UMR CNRS 6233, Aix-Marseille University, Parc Scientifique et Technologique de Luminy, Marseille, France INSERM U887 Laboratory, Faculty of Sport Sciences, University of Bourgogne, Dijon, France Oxylane Research, Villeneuve d'Ascq cedex, France.
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