The effect of time-trial duration on aerodynamic drag
Journal Title: Journal of Science and Cycling - Year 2016, Vol 5, Issue 2
Abstract
Aerodynamic drag is the main resistance (80-90 %) among the total resistive forces (RT, N) opposing motion on level ground in cycling (Debraux et al. 2011). To reduce air resistance, cyclists adopt a characteristic time trial (TT) position on the bicycle to decrease the frontal area. The bike frame and the components only accounts for about 30 % of the total drag of the cyclist-bicycle system. Thus, the cyclist position has a great importance in the performance on flat terrain to overcome at the maximum the air resistance (Oggiano et al. 2008). Many research have studied the effect of the aerodynamic position or equipment’s on the air resistance but to the best of our knowledge, no study has yet reported the effect of the duration of the exercise on aerodynamic drag. The aim of this study was to analyse the effect of time-trial duration on aerodynamic drag. We hypothesized that the more the duration of exercise is long the more the fatigue increases involving an alteration of the effective frontal area (ACd, m2) and accordingly a decrease of performance.
Authors and Affiliations
A Bouillod| EA4660, C3S Health - Sport Department, Sports University, Besancon, France.French Cycling Federation, Saint Quentin en Yvelines, France.LAAS-CNRS, Université de Toulouse, CNRS, Toulouse, France, E Brunet| French Cycling Federation, Saint Quentin en Yvelines, France, G. Soto-Romero| LAAS-CNRS, Université de Toulouse, CNRS, Toulouse, France.ISIFC, Université de Franche-Comté, France, L Garbellotto| LAAS-CNRS, Université de Toulouse, CNRS, Toulouse, France, P Millour| Laboratoire M2S, Université Rennes 2 – ENS Rennes, Rennes, France, F Grappe| EA4660, C3S Health - Sport Department, Sports University, Besancon, France.Professional Cycling Team FDJ, Moussy le Vieux, France
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