同一作業を床の上とはしご上で行う場合の強度差

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  • 同一作業を床の上とはしご上で行う場合の強度差(人間環境学)
  • ドウイツ サギョウ オ ユカ ノ ウエ ト ハシゴジョウ デ オコナウ バアイ ノ キョウドサ
  • Difference of the intensity of same work on the floor and ladder (HUMAN ENVIRONMENT)

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Abstract

To investigate the difference of work intensity of same work on the floor and ladder, 8 male subjects performed sham pruning in the laboratory with a hatched whose weight was 650g and length was 35cm. A measuring pole 4.5cm in diameter was supposed to be a tree with branches at a height of 120 and 170cm. The height of the subject on the ladder from the floor was 52 and 83cm at the left and right foot, respectively. Oxygen uptake and heart rate of 6 levels were measured i.e. while standing still holding a hatched with a hand, exercising at a branch height of 120,and 170cm, respectively, both on the floor and ladder. Concerning oxygen uptake, both while standing still and in activity, significant difference was observed between the positions on the floor and ladder. The correlation of oxygen uptake and heart rate was significant at p<0.001 about the whole data of all subjects. But according to paired-sample t test, the differences of heart rate between the positions on the floor and ladder were not significant both while standing still and in activity, dissimilar to the case of oxygen uptake.

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