國人男性雙人物料提舉能力之研究

The Study of Bi-manual Lifting Tasks in Chinese Males

本研究旨在針對國人男性雙人物料提舉作業之問題進行研究，共徵募11位男性受試者進行雙人提舉作業，以操作員的身高差異（2cm、4cm、6cm、8cm、10cm、12cm、14cm）、作業頻率（1 lift/min 及4 lifts/min）為因子，使用心物法來收集1 小時作業期間，單人作業和雙人作業時之最大可承受提舉重量（maximumaccept weight of lifting, MAWL）、心搏率（heart rate, HR）以及主觀知覺施力評量（rating of perceived exertion, RPE）等資料。資料分析後發現，身高差異對於MAWL 的影響並不顯著，身高差異對於較矮的受試者之心搏率及RPE 則有顯著之效應（p<0.05）。此外，提舉頻率對於最大可承受提舉重量與心搏率之效應為顯著（p<0.01），但對於身體各部位的主觀知覺評量表僅部份呈現顯著。最後本研究建立男性的雙人提舉預測模式，基於實用性的考量，以個人提舉重量總合（C3）與個人的一次最大總合（MT）為預測變項的模式二為最佳(R2=0.58,R2adj=0.55, PRESS=1495.62)。

The purpose of this study was to explore and assess manual material handlingproblems involving bi-manual lifting tasks. Eleven young male Chinese subjectswere recruited to participate in the bi-manual lifting task. The psychophysicalapproach was used to investigate the effect of different standing heights (2cm, 4cm,6cm, 8cm, 10cm, 12cm and 14cm) and the different lifting frequencies(1 lift/minand 4 lifts/min) on maximum acceptable weight of lifting(MAWL), heart rate(HR),and rating of perceived exertion (RPE) for a 1 hour work period. The resultsshowed that the MAWL was not significantly affected by different standing heights.The mean HR values were significantly influenced by the different standing heights(p<0.05). However, the subjects’ MAWL and HR values were significantlyinfluenced by lifting frequency (P<0.01). Some of the RPE values of the bodysegments were rated significantly different. Finally, based on the aforementioned results, the study developed prediction models for bi-manual lifting weight andlifting performance. The second model, using the sum of the individual liftingweight(C3) and the sum of the individual one time maximum weight(MT) is best(R2=0.58, R2adj =0.55, PRESS=1495.62).