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Simulation-based evaluation of upper limb postures across range of motion through muscle activity and energy expenditure

Ergonomics assessments is an indexing approach to human work activities embrace postures, load and repetitions. There are studies on ergonomics assessments comparison which have criticized the agreement among the outputs of the assessment. This research rises from an investigation by Fountain L.J. i...

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Main Author: Abd Aziz, Azizul Rahman
Format: Thesis
Language:English
Published: 2019
Subjects:
Human engineering - Case studies
Arm
Online Access:http://psasir.upm.edu.my/id/eprint/84169/1/FK%202019%20124%20-%20IR.pdf
http://psasir.upm.edu.my/id/eprint/84169/
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spelling my.upm.eprints.841692020-11-11T00:19:50Z http://psasir.upm.edu.my/id/eprint/84169/ Simulation-based evaluation of upper limb postures across range of motion through muscle activity and energy expenditure Abd Aziz, Azizul Rahman Ergonomics assessments is an indexing approach to human work activities embrace postures, load and repetitions. There are studies on ergonomics assessments comparison which have criticized the agreement among the outputs of the assessment. This research rises from an investigation by Fountain L.J. in 2003 regarding testing on 3 different postures scored by Rapid Upper Limb Assessment (RULA) on muscles activity and claimed that it was insignificant difference between measured electromyography with RULA scores. The objective of this research is to evaluate muscles activity and energy expenditure across postures deflection differences with Malaysian male anthropometry subject concerned. This evaluation covers upper limb postures as stated by RULA section A. The research was initiated with a verification study on three different elbow flexion posture angles with different scores by RULA on the prime mover muscles activity and total energy expenditure. The result has identified that variables changes existence between different postures tested and has permit for advance detail simulation using Universiti Putra Malaysia AnyBody Modelling System (AMS) software with more angles precision within the postures range of motion. The simulation outputs concerned were the specific postures prime mover muscles activity, maximum muscles activity and potential energy. The prime mover muscles simulation result has shown the co-contraction rhythm between the agonist and antagonist muscles. Maximum muscles activity represents the maximum muscles stress and potential energy expenditure as the fatigue tendency of specific posture. Both outputs were analyzed about the statistical significance using the P-value with 0.05 cut-off. Only the potential energy expenditure variable gives a P-value lower than 0.05 for all postures tested. The relationship model between the potential energy and the angle deflected has been developed to differentiate specific postures angles fatigue tendency. Both variables output value also deviated into low, medium and high magnitudes within the range. These results have enlightened the postures risk index by kinesiology magnitude reference with scores by RULA. Besides that, maximum muscles activity is more applicable for postures stress measurement compared to prime mover muscles activity which only measures the stress on specific muscles. 2019-06 Thesis NonPeerReviewed text en http://psasir.upm.edu.my/id/eprint/84169/1/FK%202019%20124%20-%20IR.pdf Abd Aziz, Azizul Rahman (2019) Simulation-based evaluation of upper limb postures across range of motion through muscle activity and energy expenditure. Doctoral thesis, Universiti Putra Malaysia. Human engineering - Case studies Arm
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
topic Human engineering - Case studies
Arm
spellingShingle Human engineering - Case studies
Arm
Abd Aziz, Azizul Rahman
Simulation-based evaluation of upper limb postures across range of motion through muscle activity and energy expenditure
description Ergonomics assessments is an indexing approach to human work activities embrace postures, load and repetitions. There are studies on ergonomics assessments comparison which have criticized the agreement among the outputs of the assessment. This research rises from an investigation by Fountain L.J. in 2003 regarding testing on 3 different postures scored by Rapid Upper Limb Assessment (RULA) on muscles activity and claimed that it was insignificant difference between measured electromyography with RULA scores. The objective of this research is to evaluate muscles activity and energy expenditure across postures deflection differences with Malaysian male anthropometry subject concerned. This evaluation covers upper limb postures as stated by RULA section A. The research was initiated with a verification study on three different elbow flexion posture angles with different scores by RULA on the prime mover muscles activity and total energy expenditure. The result has identified that variables changes existence between different postures tested and has permit for advance detail simulation using Universiti Putra Malaysia AnyBody Modelling System (AMS) software with more angles precision within the postures range of motion. The simulation outputs concerned were the specific postures prime mover muscles activity, maximum muscles activity and potential energy. The prime mover muscles simulation result has shown the co-contraction rhythm between the agonist and antagonist muscles. Maximum muscles activity represents the maximum muscles stress and potential energy expenditure as the fatigue tendency of specific posture. Both outputs were analyzed about the statistical significance using the P-value with 0.05 cut-off. Only the potential energy expenditure variable gives a P-value lower than 0.05 for all postures tested. The relationship model between the potential energy and the angle deflected has been developed to differentiate specific postures angles fatigue tendency. Both variables output value also deviated into low, medium and high magnitudes within the range. These results have enlightened the postures risk index by kinesiology magnitude reference with scores by RULA. Besides that, maximum muscles activity is more applicable for postures stress measurement compared to prime mover muscles activity which only measures the stress on specific muscles.
format Thesis
author Abd Aziz, Azizul Rahman
author_facet Abd Aziz, Azizul Rahman
author_sort Abd Aziz, Azizul Rahman
title Simulation-based evaluation of upper limb postures across range of motion through muscle activity and energy expenditure
title_short Simulation-based evaluation of upper limb postures across range of motion through muscle activity and energy expenditure
title_full Simulation-based evaluation of upper limb postures across range of motion through muscle activity and energy expenditure
title_fullStr Simulation-based evaluation of upper limb postures across range of motion through muscle activity and energy expenditure
title_full_unstemmed Simulation-based evaluation of upper limb postures across range of motion through muscle activity and energy expenditure
title_sort simulation-based evaluation of upper limb postures across range of motion through muscle activity and energy expenditure
publishDate 2019
url http://psasir.upm.edu.my/id/eprint/84169/1/FK%202019%20124%20-%20IR.pdf
http://psasir.upm.edu.my/id/eprint/84169/
_version_ 1683232255580831744
score 13.211869

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