体力科学

ローイングエルゴメーターの運動強度を決定する要因

中村好男, 玉木啓一, 富田寿人, 村岡功

1989 年 38 巻 2 号 p. 55-63
発行日: 1989/04/01
公開日: 2010/09/30

DOIhttps://doi.org/10.7600/jspfsm1949.38.55

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A study was conducted to investigate the determinants of exercise intensity using a rowing ergometer from the viewpoint of effects on oxygen uptake. Eight healthy males performed incremental exercises for three minutes at each intensity on a rowing ergometer and a bicycle ergometer, which were controlled to exert a constant preset power. Rowing pitches were set at 17, 20 and 25 strokes/min. Mechanical power for the rowing ergometer, heart rate, and oxygen uptake were measured during the final minute of each respective stage at the set load. The mechanical power which was actually exerted on the rowing ergometer increased with the rowing pitch, even though it was controlled at a constant level for each respective set load. Oxygen uptake increased with rowing pitch as well as the set load. Multiple regression analysis revealed that the rowing pitch had a greater effect on oxygen uptake than the set load. Gross efficiency varied widely with the set load, from 3.6% to 18.7%, which was a lower range than that for a bicycle ergometer. The relationship between individual heart rate and oxygen uptake for rowing exercise was similar to that for cycling exercise, indicating that heart rate is preferable for the precise prescription of exercise intensity on a rowing ergometer if the HR-VO₂ relationship is previously determined.

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位置負荷による指尖容積微分脈波の応答性について

竹宮隆, 前田順一, 安藤真太郎, 宮崎純一

1989 年 38 巻 2 号 p. 64-70
発行日: 1989/04/01
公開日: 2010/09/30

DOIhttps://doi.org/10.7600/jspfsm1949.38.64

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The effect of changes in vascular transmural pressure upon differential digital plethysmogram (delta DPG) was studied in seven normal subjects. Changes in vascular transmural pressure were produced by the gravitational potential energy change (GPEC method) of an extremity from the heart level. Delta DPG which was characteristic of stability, discrimination and low speed record by modified devices was applied for the experiments including postural, static and dynamic exercises. Room temperature during experiments was kept constant. The Delta DPG-P wave amplitude in maximal elevation of upper and lower extremities (mean±S. D., n) increased to 162.3±33.5% (38) and 176.7±33.4% (12), respectively, and that in maximal lowering of upper and lower extremities decreased to 36.9±10.5% (35) and 37.5±12.6% (15), respectively. These data reveal that the GPEC method may be useful for the determination of arteriolar sensitivity in humans.

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第84回日本体力医学会関東地方会

1989 年 38 巻 2 号 p. 71-82
発行日: 1989/04/01
公開日: 2010/09/30

DOIhttps://doi.org/10.7600/jspfsm1949.38.71

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