Brick handling: a case study.
A small change in brick dimensions resulted in an increase in the perceived work-load of men loading and unloading pallets of bricks by hand. A laboratory study indicated that the change in brick dimensions required changes in grip pattern in order to unload bricks at the same rate, moving the same number at a time. These changed grip patterns resulted in increased upper body movement, increased chest-muscle activity and higher heart rates. These differences were reflected in higher subjective ratings of fatigue.
Webb
R D
RD
Ergonomics Unit, School of Human Biology, University of Guelph, Guelph, Ontario, Canada.
Handyside
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