RETAIL-INDUSTRY
ERGONOMICS
CUMULATIVE-TRAUMA-DISORDERS

QUANTIFICATION OF WRIST MOTIONS DURING SCANNING

Cumulative trauma disorder (CTR) risks to grocery store checkers were assessed for orientation of scanners using wrist motion analysis techniques. Wrist accelerations of eight male subjects, four of which had at least 2 years of checking experience, were measured while performing product scanning. The five check stand orientations tested were front, side, over the end, European and right hand takeaway. The lowest flexion/extension and radial/ulnar accelerations were measured for the European and front stands, although accelerations for both were above the low risk benchmark. Horizontally oriented scanners had similar accelerations in these planes close to the low risk benchmark. The authors conclude that sufficient wrist accelerations were involved in checking tasks to contribute to CTD and that the FRT style stand minimized these wrist accelerations.

Human Factors, 37(2):412-423, 1995. (27 references)

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