荷物取り扱い作業時の身体的負担―性差及び作業者数による検討―

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  • Sex differences in physical load while manual handling task with team
  • ニモツ トリアツカイ サギョウジ ノ シンタイテキ フタン : セイサ オヨビ サギョウシャスウ ニ ヨル ケントウ

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The purpose of this study was to examine the sex differences in physical load during manual handling task with team. Participants performed 3 different manual handling tasks (lifting, lowering, and carrying a box). For the lifting task, participants lifted the box from the floor to the table at a height of 70cm from the floor. For the lowering task, participants lowered the box from the table to the floor. The carrying task included lifting the box from the floor, carrying the box through the given distance (3m) and placing the box on the table. Surface EMG and heart rate was measured during each task. Subjective physical load was measured after each task. The results showed that the EMG value in females were significantly higher than that of males for most of tasks, which be the result of poor muscle strength in females and sex differences in posture while manual handling task. EMG values of two-persons task were significant highly than that of one-person task, which be uneven loading due to the slight differences in height of two-persons and due to the inconsistences in the timing of handling the load between two persons. Considerations of physical load while manual handling task by females and team were discussed.

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