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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidade Iguaçu
2007
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| Online Access: | https://www.redalyc.org/articulo.oa?id=93001202 |
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Table of Contents:
- Pedaling analysis in bmx by telemetric collection of mechanic variables Philippe Campillo Timothee Doremus Jean-Michel Hespel Salud Power Cycling Crank arm CAMPILLO, P.; DOREMUS, T.; HESPEL, J.-M. Pedaling analysis in BMX bytelemetric collection of mechanic variables. Brazilian Journal of Biomotricity. v.1, n. 2, p. 15-27, 2007. The purpose of the study was to analyze the influence ofcrank lengths of the pedals on several kinematic and dynamic variables ofpedaling. Nine national or international level subjects performed 3 series of 3consecutive accelerations of 20 meters with 3 different crank lengths: 175, 180and 182 mm. A telemetric acquisition system conceived and adaptedspecifically to an experimental BMX made it possible to collect the data of 2dynamometers placed on the transmission crown and 2 velocity pick-ups fixedat the level of the teeth of the crown and the back hub. The results showed thaton an acceleration phase of 20 m, linear velocities of the BMX equipped withcranks of 182 were significantly (P<0.001) higher Vb182 (6.8 ± 2.4 m.s-1) andVb175 (5.8 ± 1.9 m.s-1). These results were the consequence of angularvelocities significantly different in P<0.01 ωp182 (10.3 ± 4.3 rad.s-1) and ωp175(9.4 ± 4.8 rad.s-1), which was not the case for the forces Fp175 (641.3 ± 190.6 N)and Fp182 (604.3 ± 210.9 N). These results allowed some of these sportsmen toreconsider the use of 182 mm cranks. 2007 artículo científico 1981-6324 https://www.redalyc.org/articulo.oa?id=93001202 en http://www.redalyc.org/revista.oa?id=930 Brazilian Journal of Biomotricity application/pdf Universidade Iguaçu Brazilian Journal of Biomotricity (Brasil) Num.2 Vol.1