作業対象物の身体に対する高さと作業強度の関係

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  • 作業対象物の身体に対する高さと作業強度の関係(B. 生活科学)
  • サギョウ タイショウブツ ノ シンタイ ニ タイスル タカサ ト サギョウ キ
  • Relationship between the relative height of work object on body and work intensity (B. LIVING SCIENCE)

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Abstract

To investigate the difference of work intensity of varied work height, 4 male subjects performed sham pruning in the laboratory with a hatched and a saw. A surveying pole was supposed to be a tree with branches at the height of 40,120,and 200cm. Oxygen uptake and heart rate of each work were measured. Both in 2 measured items, statistically significant difference was observed between the work height of 120 and 40cm, 120 and 200cm, respectively. On the whole, correlation of oxygen uptake and heart rate was significant, too. At the same time, step tests were performed and regression line of oxygen uptake on heart rate of each subject was obtained. Oxygen uptake during sham pruning estimated by these regression lines was significantly larger than the measured value, because oxygen uptake during sham pruning was considerably lower than that of stepping exercise. However, work intensity of these low activities was able to be assessed by heart rate.

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