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http://dx.doi.org/10.5307/JBE.2010.35.5.357

Analysis of Physiological Bio-information, Human Physical Activities and Load of Lumbar Spine during the Repeated Lifting Work  

Son, Hyun-Mok (Seoul National University)
SeonWoo, Hoon (Seoul National University)
Lim, Ki-Taek (Seoul National University)
Kim, Jang-Ho (Seoul National University)
Chung, Jong-Hoon (Dept. of Biosystems & Biomaterials Science and Engineering, Research Institute for Agriculture and Life Sciences, Seoul National University)
Publication Information
Journal of Biosystems Engineering / v.35, no.5, 2010 , pp. 357-365 More about this Journal
Abstract
Workers in the agricultural industry have been exposed to many work-related musculoskeletal disorders. So, our objectives in this study were to measure and analyze worker's physiological bio-information to reduce musculoskeletal disorders in relation to agricultural works. We investigated worker's bio-information of physiological signals during the repeated lifting work such as body temperature, heart rate, blood pressure, physical activity, and heart rate variability. Moreover, we analyzed the workloads of lumbar spine during the repeated lifting work using the 3-axis acceleration and angular velocity sensors. The changes of body temperature was not significant, but the mean heart rate increased from 90/min to 116/min significantly during 30 min of repeated lifting work (p<0.05). The average worker's physical activity(energy consumption rate) was 206 kcal/70kg/h during the repeated lifting work. The workers' acute stress index was more than 80, which indicated a stressful work. Also, the maximum shear force on the disk (L5/S1) of a worker's lumbar spine in static state was 500N, and the maximum inertia moment was 139 $N{\cdot}m$ in dynamic state.
Keywords
Repeated lifting work; Bio-information; Physical activity; Acute stress index; Lumbar spine workload;
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Times Cited By KSCI : 5  (Citation Analysis)
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