PMID: 8954291Jan 1, 1996Paper

Work and power outputs determined from pedalling and flywheel friction forces during brief maximal exertion on a cycle ergometer

European Journal of Applied Physiology and Occupational Physiology
N HibiK Ishii

Abstract

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 o...Continue Reading

References

Jan 1, 1976·Medicine and Science in Sports·D J Daly, P R Cavanagh
Dec 1, 1989·International Journal of Sports Medicine·D R Bassett
Jan 1, 1968·Internationale Zeitschrift für angewandte Physiologie, einschliesslich Arbeitsphysiologie·M J HoesA C Vissers
Jan 1, 1983·European Journal of Applied Physiology and Occupational Physiology·R Dotan, O Bar-Or
Jan 1, 1995·European Journal of Applied Physiology and Occupational Physiology·D SeckH Monod

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Citations

May 9, 2007·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Kathryn L FranklinBruce Davies

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