Abstracts » Business

Force exertion in awkward working postures - strength capability while twisting or working overhead

Article Abstract:

Twenty-four male subjects participated in a study which measured force exertion in awkward working positions. Subjects exerted the strongest force they could achieve in a single-handed exertion on a strain-gauged handle mounted on rigid framework and placed at different locations and positions. Isometric strength measurements were then made for six orthogonal directions of force exertion. Results showed that strength varies greatly depending on task situations, from a mean value of 72 N in a lateral exertion when lying supine and working overhead to 507 N when lifting upwards while standing and working overhead.

Methods, Muscle strength, Work, Work (Labor)

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Strength capability while kneeling

Article Abstract:

Two groups of male subjects participated in two experiments which measured the amount of maximum isometric strength that can be exerted single-handedly in a kneeling position and investigated the effects of workplaces' layout on workers' strength. The first experiment measured forces that men can exert at maximum reach distance and the second experiment examined the effects of reach distance. Results showed a mean overall force capability variation of 74 to 141% between subjects, suggesting that more force can be exerted when kneeling on one knee than on two knees.

Stature, Body height

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Seated work postures for manual, visual and combined tasks

Article Abstract:

Awkward and static work postures are known risk factors for work-related musculoskeletal problems. Factors than affect the posture adopted during work were investigated based on three types of task. Two rates of difficulty were included in each of the manual and visual elements and the results revealed that the type and difficulty of the task has an effect on the posture adopted.

Ergonomics

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