|Document ID (ISN)||72478|
|ISSN - Serial title
||0003-6870 - Applied Ergonomics
|Convention or series no.
||Nielsen P.K., Andersen L., J°rgensen K.
||The muscular load on the lower back and shoulders due to lifting at different lifting heights and frequencies
||Dec. 1998, Vol.29, No.6, p.445-450. Illus. 39 ref.
||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.
||lifting of loads; postal services; physical workload
||muscle contractor activity; lumbar column; electromyography; heart rate monitoring; measurement of load on muscles; shoulder
||D - Periodical articles
|Country / State or Province||Denmark|
|Broad subject area(s)