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Modeling and Validation of Fatigue and Recovery of Muscles for Manual Demolition Tasks

Manual demolition tasks are heavy, physically demanding tasks that could cause muscle fatigue accumulation and lead to work-related musculoskeletal disorders (WMSDs). Fatigue and recovery models of muscles are essential in understanding the accumulation and the reduction in muscle fatigue for forcef...

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Autores principales: Yi, Cannan, Tang, Fan, Li, Kai-Way, Hu, Hong, Zuo, Huali, Zhao, Caijun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8775642/
https://www.ncbi.nlm.nih.gov/pubmed/35055755
http://dx.doi.org/10.3390/ijerph19020930
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author Yi, Cannan
Tang, Fan
Li, Kai-Way
Hu, Hong
Zuo, Huali
Zhao, Caijun
author_facet Yi, Cannan
Tang, Fan
Li, Kai-Way
Hu, Hong
Zuo, Huali
Zhao, Caijun
author_sort Yi, Cannan
collection PubMed
description Manual demolition tasks are heavy, physically demanding tasks that could cause muscle fatigue accumulation and lead to work-related musculoskeletal disorders (WMSDs). Fatigue and recovery models of muscles are essential in understanding the accumulation and the reduction in muscle fatigue for forceful exertion tasks. This study aims to explore the onset of muscle fatigue under different work/rest arrangements during manual demolition tasks and the offset of fatigue over time after the tasks were performed. An experiment, including a muscle fatigue test and a muscle fatigue recovery test, was performed. Seventeen male adults without experience in demolition hammer operation were recruited as human participants. Two demolition hammers (large and small) were adopted. The push force was either 20 or 40 N. The posture mimicked that of a demolition task on a wall. In the muscle fatigue test, the muscle strength (MS) before and after the demolition task, maximum endurance time (MET), and the Borg category-ratio-10 (CR-10) ratings of perceived exertion after the demolition task were measured. In the muscle fatigue recovery test, MS and CR-10 at times 1, 2, 3, 4, 5, and 6 min were recorded. Statistical analyses were performed to explore the influence of push force and the weight of the tool on MS, MET, and CR-10. Both muscle fatigue models and muscle fatigue recovery models were established and validated. The results showed that push force affected MET significantly (p < 0.05). The weight of the tool was significant (p < 0.05) only on the CR-10 rating after the first pull. During the muscle fatigue recovery test, the MS increase and the CR-10 decrease were both significant (p < 0.05) after one or more breaks. Models of MET and MS prediction were established to assess muscle fatigue recovery, respectively. The absolute (AD) and relative (RD) deviations of the MET model were 1.83 (±1.94) min and 34.80 (±31.48)%, respectively. The AD and RD of the MS model were 1.39 (±0.81) N and 1.9 (±1.2)%, respectively. These models are capable of predicting the progress and recovery of muscle fatigue, respectively, and may be adopted in work/rest arrangements for novice workers performing demolition tasks.
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spelling pubmed-87756422022-01-21 Modeling and Validation of Fatigue and Recovery of Muscles for Manual Demolition Tasks Yi, Cannan Tang, Fan Li, Kai-Way Hu, Hong Zuo, Huali Zhao, Caijun Int J Environ Res Public Health Article Manual demolition tasks are heavy, physically demanding tasks that could cause muscle fatigue accumulation and lead to work-related musculoskeletal disorders (WMSDs). Fatigue and recovery models of muscles are essential in understanding the accumulation and the reduction in muscle fatigue for forceful exertion tasks. This study aims to explore the onset of muscle fatigue under different work/rest arrangements during manual demolition tasks and the offset of fatigue over time after the tasks were performed. An experiment, including a muscle fatigue test and a muscle fatigue recovery test, was performed. Seventeen male adults without experience in demolition hammer operation were recruited as human participants. Two demolition hammers (large and small) were adopted. The push force was either 20 or 40 N. The posture mimicked that of a demolition task on a wall. In the muscle fatigue test, the muscle strength (MS) before and after the demolition task, maximum endurance time (MET), and the Borg category-ratio-10 (CR-10) ratings of perceived exertion after the demolition task were measured. In the muscle fatigue recovery test, MS and CR-10 at times 1, 2, 3, 4, 5, and 6 min were recorded. Statistical analyses were performed to explore the influence of push force and the weight of the tool on MS, MET, and CR-10. Both muscle fatigue models and muscle fatigue recovery models were established and validated. The results showed that push force affected MET significantly (p < 0.05). The weight of the tool was significant (p < 0.05) only on the CR-10 rating after the first pull. During the muscle fatigue recovery test, the MS increase and the CR-10 decrease were both significant (p < 0.05) after one or more breaks. Models of MET and MS prediction were established to assess muscle fatigue recovery, respectively. The absolute (AD) and relative (RD) deviations of the MET model were 1.83 (±1.94) min and 34.80 (±31.48)%, respectively. The AD and RD of the MS model were 1.39 (±0.81) N and 1.9 (±1.2)%, respectively. These models are capable of predicting the progress and recovery of muscle fatigue, respectively, and may be adopted in work/rest arrangements for novice workers performing demolition tasks. MDPI 2022-01-14 /pmc/articles/PMC8775642/ /pubmed/35055755 http://dx.doi.org/10.3390/ijerph19020930 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yi, Cannan
Tang, Fan
Li, Kai-Way
Hu, Hong
Zuo, Huali
Zhao, Caijun
Modeling and Validation of Fatigue and Recovery of Muscles for Manual Demolition Tasks
title Modeling and Validation of Fatigue and Recovery of Muscles for Manual Demolition Tasks
title_full Modeling and Validation of Fatigue and Recovery of Muscles for Manual Demolition Tasks
title_fullStr Modeling and Validation of Fatigue and Recovery of Muscles for Manual Demolition Tasks
title_full_unstemmed Modeling and Validation of Fatigue and Recovery of Muscles for Manual Demolition Tasks
title_short Modeling and Validation of Fatigue and Recovery of Muscles for Manual Demolition Tasks
title_sort modeling and validation of fatigue and recovery of muscles for manual demolition tasks
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8775642/
https://www.ncbi.nlm.nih.gov/pubmed/35055755
http://dx.doi.org/10.3390/ijerph19020930
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