Comparison of static lifting capacity between experienced and novice Taiwanese female workers.

Abstract

Previous studies have analyzed the lifting capacity of either experienced workers or novices, but a systematic comparison of the lifting capacity of experienced female workers and novices has not been conducted. This study was conducted to identify differences in lifting strengths and postures between experienced and novice Taiwanese female workers. Twenty-three experienced female workers and 23 novices volunteered for this study. Their static lifting strengths (n = 46) and lifting postures (n = 22) were analyzed using statistical analysis software. Experienced workers' vertical lifting strengths were approximately 5-7 kg lower than those of novices at lower heights (≤50 cm). However, at heights equal to or higher than 90 cm, the experienced workers generated approximately 2-3 kg higher toward-body lifting strengths than did novices. The experienced workers' strengths at all 15 lifting heights were relatively unchanged, compared with changes in the novices' strengths. Experienced workers tended to adopt a consistently deep squat at lower heights and a more flexed arm posture at higher heights. Through daily work experience, experienced workers may have subconsciously learned to shift their postures to avoid overexertion. These techniques for safe lifting should be taught to new Taiwanese female workers.