Such interactions have been shown to be associated with high prevalence of WMSDs of
the upper body segment [55].
The associated symptoms in other body segments
(lower back, middle back, and neck), however,
could be ascribed to the indirect, concerted
effort by the musculoskeletal components of the
back and neck to keep the head steady [56]. Similarly,
administrative workers recorded the highest
prevalence (66.7%) of upper and lower back
symptoms (including the waist) of WMSDs, followed
by storekeepers (63.6%) and transporters
(32.1%). These trades have some common elements
among them that are associated with a high
vulnerability of workers to sustaining upper and
lower back injuries and associated symptoms. A
previous ergonomics survey of workers in these
trades revealed common risk factors, including
repetitive tasks, static loading or sustained exertion,
awkward postures, and mechanical contact
stress [57].
Such interactions have been shown to be associated with high prevalence of WMSDs ofthe upper body segment [55].The associated symptoms in other body segments(lower back, middle back, and neck), however,could be ascribed to the indirect, concertedeffort by the musculoskeletal components of theback and neck to keep the head steady [56]. Similarly,administrative workers recorded the highestprevalence (66.7%) of upper and lower backsymptoms (including the waist) of WMSDs, followedby storekeepers (63.6%) and transporters(32.1%). These trades have some common elementsamong them that are associated with a highvulnerability of workers to sustaining upper andlower back injuries and associated symptoms. Aprevious ergonomics survey of workers in thesetrades revealed common risk factors, includingrepetitive tasks, static loading or sustained exertion,awkward postures, and mechanical contactstress [57].
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