Energy cost of riding bicycles with shock absorption systems on a flat surface
Deutscher übersetzter Titel: | Energieaufwand beim Radfahren auf Rädern mit stoßabfedernden Systemen im ebenen Gelände |
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Autor: | Nielens, H.; Lejeune, T.M. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 22 (2001), 6, S. 400-404, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-2001-16242 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU200402000607 |
Quelle: | BISp |
Abstract des Autors
Bike shock absorption systems reduce the energy variation induced by terrain irregularities, leading to a greater comfort. However, they may also induce an increase in energy expenditure for the rider. More specifically, cross-country racers claim that rear shock absorption systems generate significant energy loss. The energy losses caused by such systems may be divided in terrain-induced or rider-induced. This study aims at evaluating the rider-induced energy loss of modern suspended bicycles riding on a flat surface. Twelve experienced competitive racers underwent three multistage gradational tests (50 to 250 W) on a cross-country bicycle mounted on an electromagnetically braked cycle ergometer. Three different tests were performed on a fully suspended bike, front suspended and non-suspended bicycle, respectively. The suspension mode has no significant effect on VO2. The relative difference of VO2 between the front-suspended or full-suspended bike and the rigid bike reaches a non significant maximum of only 3 %. The claims of many competitors who still prefer front shock absorption systems could be related to a possible significant energy loss that could be present at powers superior to 250 W or when they stand on the pedals. It could also be generated by terrain-induced energy loss. Verf.-Referat