A study of combined manual materials handling tasks under footwear and lifting and lowering height conditions

摘要: A study on combined manual materials handling tasks performed floors under three footwear and four lifting lowering height conditions. Twelve male subjects participated in the study. The maximum acceptable weight of handling, including lifting, carrying for 3 m, lowering, walking m back at 2 per minute was determined. subject then same 10 minutes. VO , heart rate, rating perceived exertion whole body strain were measured. results showed that effects weights (MAWH), not significant. all dependent variables except statistically significant (p≤0.027). Lifting from floor condition most stressful than other condition. had lowest MAWH this In addition, resulted highest physiological responses both rate. RPE was, however, implication should be regarded as one major job factors designing MMH it affected subjects. This is consistent with findings literature.