Effects of different lifting and lowering heights on upper arm, shoulder and back muscle activity during a manual material handling task.
BACKGROUND: Previous research has suggested eliminating certain types of manual material handling (MMH) work by recommending specific arm angles and postures to avoid, such as arm flexion or abduction over 90°. MMH with arm flexion over 90° can require lifting objects as well as lowering objects. Ho...
| Publicado en: | Work Vol. 53; no. 1; pp. 175 - 180 |
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| Autores principales: | , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Sage Publications Inc.
2016
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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=113197495&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 113197495 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10519815 3RC jtl: Work issn: 10519815 maglogo: N pubinfo: dt: 2016 vid: 53 iid: 1 pid: 344 pub: Sage Publications Inc. place: Thousand Oaks, California artinfo: ui: 113197495 113197495 113197495 10.3233/WOR-152157 113197495 ppf: 175 ppct: 5 formats: fmt: @attributes: type: P tig: atl: Effects of different lifting and lowering heights on upper arm, shoulder and back muscle activity during a manual material handling task. aug: au: In-gyu Yoo Won-gyu Yoo affil: Department of Occupational Therapy, College of Medical Sciences, Jeonju University, Republic of Korea sug: subj: Lifting Biomechanics Task Performance and Analysis Human Electromyography Repeated Measures One-Way Analysis of Variance P-Value Data Analysis Software Male Adult Occupational-Related Injuries Musculoskeletal Diseases Adult: 19-44 years Male ab: BACKGROUND: Previous research has suggested eliminating certain types of manual material handling (MMH) work by recommending specific arm angles and postures to avoid, such as arm flexion or abduction over 90°. MMH with arm flexion over 90° can require lifting objects as well as lowering objects. However, few studies have evaluated MMH work while lowering objects in detail. OBJECTIVE: This study investigated the effects of different lifting and lowering heights on upper arm, shoulder, and back muscle activity during a MMH task. METHODS: The participants performed a MMH task that involved stoop lowering and lifting. The participants transferred the box to shelves positioned 30 cm in front of them under various conditions. Conditions 1 to 4 involved transferring the box to 1) ankle-, 2) knee-, 3) waist-, and 4) shoulder-high shelves, respectively. Surface electrodes were attached to the biceps brachii, upper trapezius, rhomboid minor, and L4 erector spinae. RESULTS: The activity of the biceps brachii was decreased significantly in Conditions 1 and 2 compared to Conditions 3 and 4. The upper trapezius activity was increased significantly in Conditions 1 and 4 compared to Conditions 2 and 3. The rhomboid minor activity increased significantly in Condition 1 compared to Conditions 2 to 4. The L4 erector spinae activity decreased significantly in Condition 1 compared to Conditions 2 to 4 CONCLUSIONS: A low-lowering MMH work could contribute to neck, shoulder, and back pain. Therefore, further studies must examine a height below-knee MMH work in detail. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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