研究者詳細 - 藤永　博

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.

DOI

筋の動的機能に関する研究のための自転車エルゴメーターの利用について

藤永博

和歌山大学経済学会経済理論 ( 和歌山大学 ) 261 ( 261 ) 1 - 15 1994年

A Remark on Recent Cycle Ergometry

藤永博

和歌山大学経済学会経済理論 ( 和歌山大学 ) 253 ( 253 ) 93 - 103 1993年

The Effect of Aging on Left Ventricular Function as Assessed by Doppler Ultrasound

Medicine and Science in Sports and Exercise 19 ( 2 ) 1987年

ASUの学生スポーツ

藤永博

体育の科学 37 ( 5 ) 1987年

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