Maximum acceptable frequency of lift for combined manual material handling task in Malaysia

Background : Extensive studies have been carried out over the years to determine the maximum acceptable weight that a worker is capable of lifting in a given situation among Occidental populations across Europe and US. Nonetheless, studies that place emphasis on using lifting frequency as the quanti...

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Main Authors:	Widia, Mirta, Siti Zawiah, M. D., Nukman, Yusof
Format:	Article
Language:	English
Published:	Public Library of Science 2019
Subjects:	QC Physics TH Building construction TS Manufactures
Online Access:	http://umpir.ump.edu.my/id/eprint/25111/ http://umpir.ump.edu.my/id/eprint/25111/ http://umpir.ump.edu.my/id/eprint/25111/ http://umpir.ump.edu.my/id/eprint/25111/1/Maximum%20acceptable%20frequency%20of%20lift%20for%20combined%20manual.pdf

id	ump-25111
recordtype	eprints
spelling	ump-251112019-06-25T07:27:58Z http://umpir.ump.edu.my/id/eprint/25111/ Maximum acceptable frequency of lift for combined manual material handling task in Malaysia Widia, Mirta Siti Zawiah, M. D. Nukman, Yusof QC Physics TH Building construction TS Manufactures Background : Extensive studies have been carried out over the years to determine the maximum acceptable weight that a worker is capable of lifting in a given situation among Occidental populations across Europe and US. Nonetheless, studies that place emphasis on using lifting frequency as the quantifying task parameter, especially in developing countries such as Malaysia, appear to be in scarcity. Hence, this study determined the maximum acceptable frequency of lift (MAFL) for combined manual material handling (MMH) tasks amongst Malaysian males. Method : Two lifting loads were considered in this study: 1 kg and 5 kg. Each subject adjusted his frequency of lifting using a psychophysical approach. The subjects were instructed to perform combined MMH task as fast as they could over a period of 45 minutes without exhausting themselves or becoming overheated. The physiological response energy expenditure was recorded during the experimental sessions. The ratings of perceived exertion (RPE) for four body parts (forearms, upper arm, lower back and entire body) were recorded after the subjects had completed the instructed task. Results : The mean frequencies of the MMH task had been 6.8 and 5.5 cycles/minute for lifting load of 1 and 5 kg, respectively, while the mean energy expenditure values were 4.16 and 5.62 kcal/min for 1 and 5 kg load, respectively. These displayed a significant difference in the Maximum Acceptable Frequency of Lift (MAFL) between the two loads, energy expenditure and RPE (p < 0.05) whereby the subjects appeared to work harder physiologically for heavier load. Conclusion : It can be concluded that it is significant to assess physiological response and RPE in determining the maximum acceptable lifting frequency at varied levels of load weight. The findings retrieved in this study can aid in designing tasks that do not exceed the capacity of workers in order to minimise the risk of WRMSDs. Public Library of Science 2019-05-29 Article PeerReviewed pdf en cc_by_4 http://umpir.ump.edu.my/id/eprint/25111/1/Maximum%20acceptable%20frequency%20of%20lift%20for%20combined%20manual.pdf Widia, Mirta and Siti Zawiah, M. D. and Nukman, Yusof (2019) Maximum acceptable frequency of lift for combined manual material handling task in Malaysia. PLoS ONE, 14 (5). pp. 1-13. ISSN 1932-6203 https://doi.org/10.1371/journal.pone.0216918 https://doi.org/10.1371/journal.pone.0216918
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	QC Physics TH Building construction TS Manufactures
spellingShingle	QC Physics TH Building construction TS Manufactures Widia, Mirta Siti Zawiah, M. D. Nukman, Yusof Maximum acceptable frequency of lift for combined manual material handling task in Malaysia
description	Background : Extensive studies have been carried out over the years to determine the maximum acceptable weight that a worker is capable of lifting in a given situation among Occidental populations across Europe and US. Nonetheless, studies that place emphasis on using lifting frequency as the quantifying task parameter, especially in developing countries such as Malaysia, appear to be in scarcity. Hence, this study determined the maximum acceptable frequency of lift (MAFL) for combined manual material handling (MMH) tasks amongst Malaysian males. Method : Two lifting loads were considered in this study: 1 kg and 5 kg. Each subject adjusted his frequency of lifting using a psychophysical approach. The subjects were instructed to perform combined MMH task as fast as they could over a period of 45 minutes without exhausting themselves or becoming overheated. The physiological response energy expenditure was recorded during the experimental sessions. The ratings of perceived exertion (RPE) for four body parts (forearms, upper arm, lower back and entire body) were recorded after the subjects had completed the instructed task. Results : The mean frequencies of the MMH task had been 6.8 and 5.5 cycles/minute for lifting load of 1 and 5 kg, respectively, while the mean energy expenditure values were 4.16 and 5.62 kcal/min for 1 and 5 kg load, respectively. These displayed a significant difference in the Maximum Acceptable Frequency of Lift (MAFL) between the two loads, energy expenditure and RPE (p < 0.05) whereby the subjects appeared to work harder physiologically for heavier load. Conclusion : It can be concluded that it is significant to assess physiological response and RPE in determining the maximum acceptable lifting frequency at varied levels of load weight. The findings retrieved in this study can aid in designing tasks that do not exceed the capacity of workers in order to minimise the risk of WRMSDs.
format	Article
author	Widia, Mirta Siti Zawiah, M. D. Nukman, Yusof
author_facet	Widia, Mirta Siti Zawiah, M. D. Nukman, Yusof
author_sort	Widia, Mirta
title	Maximum acceptable frequency of lift for combined manual material handling task in Malaysia
title_short	Maximum acceptable frequency of lift for combined manual material handling task in Malaysia
title_full	Maximum acceptable frequency of lift for combined manual material handling task in Malaysia
title_fullStr	Maximum acceptable frequency of lift for combined manual material handling task in Malaysia
title_full_unstemmed	Maximum acceptable frequency of lift for combined manual material handling task in Malaysia
title_sort	maximum acceptable frequency of lift for combined manual material handling task in malaysia
publisher	Public Library of Science
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/25111/ http://umpir.ump.edu.my/id/eprint/25111/ http://umpir.ump.edu.my/id/eprint/25111/ http://umpir.ump.edu.my/id/eprint/25111/1/Maximum%20acceptable%20frequency%20of%20lift%20for%20combined%20manual.pdf
first_indexed	2023-09-18T22:38:23Z
last_indexed	2023-09-18T22:38:23Z
_version_	1777416749475430400

Maximum acceptable frequency of lift for combined manual material handling task in Malaysia

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