A biomechanical analysis of industrial manual materials handlers

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Abstract

Resultant forces and torques on the joints of 1 I fem ales were stud led as the subjects performed two manual materials handling tasks in their industrial environment. The subjects activities were recorded by high speed (102 frames per second) 16 mm cinematography and the data analysed by a static and dynamic biomechanical model. Statistically significant differences were found between the results of the static and dynamic analyses. Slower filming rates were Simulated and were found to show fewer significant.differences between the static and dynamic analysis as the data sampling rate decreased. A kinematic analysis of the experienced and inexperienced lifters revealed a great deal of intra-'subject variability as well as inter-subject variability indicating that the subjects varied their motion patterns as they Iifled or lowered several 14 kg loads. F or submaximal tasks such a variation in lifting patterns would allow the subjects to develop muscular load sharing which would help reduce localized muscle fatigue associated with repetitive tining activities.

Original languageEnglish
Pages (from-to)299-308
Number of pages10
JournalErgonomics
Volume25
Issue number4
DOIs
StatePublished - Apr 1982

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