Evaluation of musculoskeletal workload of manual operating tasks using a hydraulic jack based on ergonomic postural analysis and electromyography: A case study of non-professional young male users.
BACKGROUND: Manual operations of the hydraulic jack device can become ergonomic stressors for the musculoskeletal system because of the required operational forces, muscle activities, or working postures. However, the usability of the hydraulic jack has not been fully explored for non-professional p...
| Publicado en: | Work Vol. 72; no. 2; pp. 677 - 686 |
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| Autores principales: | , , , , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Sage Publications Inc.
2022
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=157765930&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 157765930 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10519815 3RC jtl: Work issn: 10519815 maglogo: N pubinfo: dt: 2022 vid: 72 iid: 2 pid: 344 pub: Sage Publications Inc. place: Thousand Oaks, California artinfo: ui: 157765930 156699180 157765930 157765930 10.3233/WOR-210079 157765930 ppf: 677 ppct: 9 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Evaluation of musculoskeletal workload of manual operating tasks using a hydraulic jack based on ergonomic postural analysis and electromyography: A case study of non-professional young male users. aug: au: Sugama, Atsushi Nishimura, Takahiro Doi, Kouki Shimada, Shigenobu Chikai, Manabu Nunokawa, Kiyohiko Ino, Shuichi affil: Risk Management Research Group, National Institute of Occupational Safety and Health, Japan, Kiyose, Tokyo, Japan sug: subj: Rescue Work Equipment and Supplies Muscle, Skeletal Weight-Bearing Evaluation Body Positions Posture Evaluation Ergonomics Evaluation Task Performance and Analysis Electromyography Human Male Shoulder Joint Abduction Torso Rotation Adult Japan Firefighters Experimental Studies Questionnaires Analysis of Variance Post Hoc Analysis Chi Square Test Data Analysis Software Funding Source Adult: 19-44 years Male ab: BACKGROUND: Manual operations of the hydraulic jack device can become ergonomic stressors for the musculoskeletal system because of the required operational forces, muscle activities, or working postures. However, the usability of the hydraulic jack has not been fully explored for non-professional personnel. OBJECTIVES: To evaluate the musculoskeletal loads during manual operations of a hydraulic jack based on the ergonomic postural analysis and electromyography METHODS: Nine men operated the lever of a hydraulic jack with three positions: parallel to and near (P-N), parallel to and far from (P-F), and orthogonal to the jack lever (O). Postural loads were evaluated by Loading on the Upper Body Assessment (LUBA), an ergonomic observational method, and were classified into action categories. The surface electromyogram of eight muscles and the subjective sense of burden were also measured. RESULTS: The initial force for lever pushing reached 40–80 N and exceeded the recommended forces for the unusual postures. The overall assessment of LUBA showed that 31% of working postures observed in O position require immediate consideration and corrective action and the maximum holding time estimated was < 1 minute. The postural load increased due to the shoulder joint abduction in the P-F and O positions and due to the trunk rotation in O position. CONCLUSIONS: The results suggest that operating the hydraulic jack cause considerable postural loads and manual forces insufficient for several minutes of manual task. Therefore, improving working methods and tool designs are needed to improve usability and decrease the risk of musculoskeletal disorders during jack operations. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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