Journal
APPLIED ERGONOMICS
Volume 93, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apergo.2021.103356
Keywords
Musculoskeletal disorders; Exposure variability; Inertial measurement unit; Posture; Low back; Shoulder
Categories
Funding
- Centers for Disease Control (CDC)/National Institute for Occupational Safety and Health (NIOSH) [K01OH011183]
- Deep South Center for Occupational Health and Safety (CDC/NIOSH) [T42OH008436]
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The study compared the levels of posture and movement speed exposure between manufacturing workers primarily performing cyclic and non-cyclic tasks, and explored exposure variance patterns within and between workers in each group. Results showed significantly higher movement speeds for workers performing predominantly cyclic tasks and greater exposure variability within the non-cyclic group.
Musculoskeletal disorders (MSDs) are common among manufacturing workers. Exposure to non-neutral postures and high movement speeds associated with MSDs among manufacturing workers may depend on the extent of the variability in the work tasks performed (i.e., predominantly ?cyclic? versus ?non-cyclic? work). The objectives of this study were to (i) compare mean levels of full-shift exposure summary metrics based on both posture and movement speed between manufacturing workers performing predominantly cyclic (n = 18) and non-cyclic (n = 17) tasks, and (ii) explore patterns of between-and within-worker exposure variance and between-minute (within-shift) exposure level and variation within each group. Inertial sensors were used to measure exposures for up to 15 full shifts per participant. Results indicated (i) substantially higher upper arm and trunk movement speeds among workers performing predominantly cyclic tasks relative to workers performing non-cyclic tasks despite similar postures, and (ii) greater exposure variability both between and within workers in the non-cyclic group.
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