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Vol. 34, No. 8(3), S&M3042

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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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Sensors and Materials, Volume 33, Number 11(1) (2021)
Copyright(C) MYU K.K.
pp. 3863-3872
S&M2729 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2021.3607
Published: November 17, 2021

Assessment of Physical Workload of Choker Setter in Tree-length Extraction Operation by Cable Yarder [PDF]

Min-Jae Cho, Eung-Jin Jeong, Eunjai Lee, Jae-Heun Oh, and Sang-Kyun Han

(Received August 30, 2021; Accepted October 22, 2021)

Keywords: cable yarding, physiological workload, relative heart rate, treadmill test, wearable electronic device

Cable yarding operations on steep terrain have always been a challenge with respect to safety as they are mostly undertaken by manual laborers, particularly in South Korea. Steep slopes are associated with a high workload for choker setters. Therefore, the main goals of this study were to determine the heart rate and oxygen consumption of choker setters and evaluate their workload during clear-cut operations on a Larix kaempferi stand using a Polar M400, H7 heart rate sensor. Three choker setters were continuously evaluated during one working day. Overall, the mean working heart rate (HRw) during choking operations ranged from 87 to 104 bpm at a maximum oxygen consumption rate of 0.9 to 1.4 L/min. The choker setters recorded most of the effective work time on the “wait” (68.5%) and “walk-in” (7.8%) work elements. In addition, the physiological workload differed among the various elements of the cable yarding operation, with a higher HRw associated with a higher workload. Our findings may provide useful information for managing the health and safety of forestry crews during cable extraction activities.

Corresponding author: Sang-Kyun Han


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This work is licensed under a Creative Commons Attribution 4.0 International License.

Cite this article
Min-Jae Cho, Eung-Jin Jeong, Eunjai Lee, Jae-Heun Oh, and Sang-Kyun Han, Assessment of Physical Workload of Choker Setter in Tree-length Extraction Operation by Cable Yarder, Sens. Mater., Vol. 33, No. 11, 2021, p. 3863-3872.



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