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Document ID (ISN)72478
CIS number 99-680
ISSN - Serial title 0003-6870 - Applied Ergonomics
Year 1998
Convention or series no.
Author(s) Nielsen P.K., Andersen L., J°rgensen K.
Title The muscular load on the lower back and shoulders due to lifting at different lifting heights and frequencies
Bibliographic information Dec. 1998, Vol.29, No.6, p.445-450. Illus. 39 ref.
Abstract The muscular and circulatory loads on postal workers during repetitive lifting of mail transport boxes were investigated. In a laboratory study, surface electromyography and heart rate were measured for nine combinations of lifting height and frequency. Results showed a trade off between the low back and shoulders. The maximum load on the low back occurred at the low lifting height (36.3 and 54.4cm), whereas the maximum load on the shoulders occurred at the high lifting height (144.9 and 163.0cm). The circulatory response was highest during lifting from the extreme heights at the highest frequency. It is suggested that lifting mail boxes from the lowest and highest heights should be minimized. Preferred heights would be 72.5-126.8cm above floor level. Topics: electromyography; heart rate monitoring; lifting of loads; lumbar column; measurement of load on muscles; muscle contractor activity; physical workload; postal services; shoulder.
Descriptors (primary) lifting of loads; postal services; physical workload
Descriptors (secondary) muscle contractor activity; lumbar column; electromyography; heart rate monitoring; measurement of load on muscles; shoulder
Document type D - Periodical articles
Country / State or ProvinceDenmark
Subject(s) Occupational physiology
Broad subject area(s) Physiology, ergonomics
Browse category(ies) Communications industry