抬舉作業中非對稱角度對軀幹扭轉角度及生理成本之效應

Asymmetrical Angle Effect on Trunk Asymmetrical Angle and Physiological Cost for Lifting

吳水丕(Swei-Pi Wu) ； 郭佳珍(Jia-Jen Guo)

《工作與休閒學刊》 3卷1期 (2012/03) Pp. 59-77

https://doi.org/10.6848/JWL.201203_3(1).0005

摘要

本研究主要目的係針對男性抬舉作業時在不同的抬舉頻率、抬舉重量下，非對稱角度對於軀幹扭轉角度，生理成本及主觀施力知覺評量（RPE）之效應。本研究共有12位男性受試者參與實驗，每位受試者以隨機化的順序進行16次的抬舉作業，包括兩種頻率（1次／分和6次／分）、兩種負重（6kg和15kg）以及四種非對稱角度（0°、45°、90°和135°）的組合，以收集受試者的心搏率（HR）和其進行非對稱角度下抬舉作業時的軀幹扭轉角度、主觀知覺施力評量表（RPE）。資料經蒐集分析後發現：（1）抬舉頻率、負重與非對稱角度對於心搏率皆有顯著效應，心搏率會隨著頻率、負重以及非對稱角度的增加而上升。（2）受試者的軀幹扭轉角度受到非對稱角度和抬舉重量的顯著影響；隨著非對稱角度增加，受試者的軀幹扭轉角度也會呈線性增加，而且上背的扭轉角度會比腰部扭轉角度為大；此外，隨著抬舉重量增加，受試者的軀幹扭轉角度會相對的減少。（3）非對稱角度、抬舉頻率和抬舉重量對於受試者的RPE平均值有顯著的影響。受試者認為手指最為勞累（RPE＝12.41），其次是背部（RPE＝12.31）。

關鍵字

人工物料搬運 ； 非對稱抬舉 ； 生理學法 ； 軀幹扭轉角

並列摘要

This study investigates the lifting frequency, lifting load and asymmetrical angle effects on the trunk asymmetrical angle, physiological cost and rating of perceived exertion. Twelve Chinese male college students performed 16 different lifting tasks in random order. The independent variables examined were lifting frequency (1 and 6 lifts/min), lifting load (6kg and 15kg), and asymmetrical angle (0°、45°、90° and 135°). The criterion measures were heart rate, trunk asymmetrical angle and rating of perceived exertion (RPE). The results showed that: (1) The heart rate was significantly affected by the lifting frequency, load and asymmetrical angle, and the heart rate increased with lifting frequency, load and asymmetrical angle. (2) The trunk asymmetrical angle was significantly affected by the asymmetrical angle and lifting load. The trunk asymmetrical angle increased with the asymmetrical angle of the lift and the upper back angle was larger than the waist angle. The trunk asymmetrical angle declined with the increase in lifting load. (3) The asymmetrical angle, lifting frequency and load significantly affected the overall RPE values. The most stressed body parts were the fingers (RPE=12.41) and back (RPE=12.31).

並列關鍵字

manual material handling ； asymmetrical lifting ； physiological ； trunk asymmetrical angle

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