Work and power outputs determined from pedalling and flywheel friction forces during brief maximal exertion on a cycle ergometer
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Deutscher übersetzter Titel: | Bestimmung der Werte der Arbeit und Leistung während kurzer maximaler Fahrradergometerbelastung aus Pedalkraft und Schwungradwiderstand |
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Autor: | Hibi, Naohiro; Fujinaga, Hiroshi; Ishii, Kihachi |
Erschienen in: | European journal of applied physiology |
Veröffentlicht: | 74 (1996), 5, S. 435-442, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 1439-6319, 0301-5548 |
DOI: | 10.1007/BF02337724 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199611201454 |
Quelle: | BISp |
TY - JOUR AU - Hibi, Naohiro A2 - Hibi, Naohiro A2 - Fujinaga, Hiroshi A2 - Ishii, Kihachi DB - BISp DP - BISp KW - Analyse, biomechanische KW - Belastung, supramaximale KW - Bremskraft KW - Fahrradergometrie KW - Kraftmessung KW - Leistungsdiagnostik KW - Leistungsmessung KW - Pedalarbeit KW - Reibungskraft KW - Sportmedizin KW - Sprint KW - Trägheitsmoment KW - Wattleistung LA - eng TI - Work and power outputs determined from pedalling and flywheel friction forces during brief maximal exertion on a cycle ergometer TT - Bestimmung der Werte der Arbeit und Leistung während kurzer maximaler Fahrradergometerbelastung aus Pedalkraft und Schwungradwiderstand PY - 1996 N2 - Work and power outputs during short-term, maximal exertion on a friction loaded cycle ergometer are usually calculated from the friction force applied to the flywheel. The inertia of the flywheel is sometimes taken into consideration, but the effects of internal resistances and other factors have been ignored. The purpose of this study was to estimate their effects by comparing work or power output determined from the force exerted on the pedals (pedalling force) with work or power output determined from the friction force and the moment of inertia of the rotational parts. A group of 22 male college students accelerated a cycle ergometer as rapidly as possible for 3 s. The total work output determined from the pedalling force (TWp) was significantly greater than that calculated from the friction force and the moment of inertia (TWf). Power output determined from the pedalling force during each pedal stroke (SPp) was also significantly greater than that calculated from the friction force and the moment of inertia. Percentage difference (%diff), defined by %diff = ((TWp - TWf)/TWf) x 100, ranged from 16.8% to 49.3% with a mean value of 30.8(SD 9.1)%. It was observed that %diff values were higher in subjects with greater TWp or greater maximal SPp. These results would indicate that internal resistances and other factors, such as the deformation of the chain and the vibrations of the entire system, may have significant effects on the measurements of work and power outputs. The effects appear to depend on the magnitudes of pedalling force and pedal velocity. Verf.-Referat L2 - https://dx.doi.org/10.1007/BF02337724 DO - 10.1007/BF02337724 SP - S. 435-442 SN - 1439-6319 JO - European journal of applied physiology IS - 5 VL - 74 M3 - Gedruckte Ressource M3 - Elektronische Ressource (online) ID - PU199611201454 ER -