| The use of treadmill ergometers for extensive calculation of external work and leg stiffness during running. | |
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MedLine Citation:
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PMID: 15045508 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Recently, new treadmill ergometers have been designed to measure the ground reaction forces during numerous successive steps. From ground reaction forces measured in track running, it has been shown to be possible to compute external mechanical work ( W(ext)) and leg stiffness ( k) of a bouncing spring-mass system. However, to the best of our knowledge, there is still no study reporting the inter-stride coefficient of variation (CoV) of W(ext) or k parameters calculated from many successive steps. The aim of this experiment was to investigate the intra-and inter-individual variations of W(ext) and k while running at different speeds on a treadmill ergometer. Thirteen healthy runners ran at 12, 14, 16 and 18 km h(-1) during 3 min. Ground reaction forces were measured and recorded during the last 20 s of each exercise (50-62 steps). From these forces, average values and CoV of W(ext) and k were calculated. W(ext) significantly increased while k decreased with speed (both P<0.001). The mean values of these parameters were in agreement with data already reported and the CoV was less than 6% for all the parameters, showing almost no variation with speed. Therefore, this method of calculation, based on the extensive measurements of ground reaction forces, can be used to extensively study the mechanical parameters of treadmill running, and especially the inter-stride variability. |
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Authors:
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Patrick Avogadro; Christelle Chaux; Muriel Bourdin; Georges Dalleau; Alain Belli |
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Publication Detail:
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Type: Clinical Trial; Journal Article Date: 2004-03-26 |
Journal Detail:
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Title: European journal of applied physiology Volume: 92 ISSN: 1439-6319 ISO Abbreviation: Eur. J. Appl. Physiol. Publication Date: 2004 Jun |
Date Detail:
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Created Date: 2004-05-28 Completed Date: 2004-12-21 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 182-5 Citation Subset: IM |
Affiliation:
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Groupe de Recherche PPEH-GIP Exercice Sport Santé, Pav. 12 Hôpital St Jean Bonnefonds, CHU de St Etienne, 42055 St Etienne, Cedex 2, France. patrick.avogadro@univ-st-etienne.fr |
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Algorithms* Computer Simulation Elasticity Energy Transfer / physiology* Ergometry / methods Exercise Test / methods* Humans Leg / physiology* Models, Biological Physical Examination / methods* Physical Exertion / physiology* Running / physiology* |
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