Handle positions and angles in a dynamic lifting task Part 2. Psychophysical measures and heart rate

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Abstract
This paper continues the results of the experiment on handle positions and angles in lifting described in Part 1. Heart rate rated perceived exertion, and body-part discomfort were measured on 30 subjects lifting boxes from floor to waist, waist to shoulder and floor to shoulder. Movement distance had a large effect on all measures. A handle angle of 70° between box and horizontal was found better than an angle of 35°. Handle position differences were minimal. The design for cut-out handles on a box, presented in Part 1, was confirmed by these results.

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