Effects of physical and mental demands on shoulder muscle fatigue.
Mental demands have been associated with increased risk of injuries; however, its influence on muscle fatigability remains unclear. The aim of this study was to investigate the interaction of mental workload and physical workload on muscle fatigability during repetitive shoulder work. Twelve young p...
| Publicado en: | Work Vol. 41; pp. 2897 - 2902 |
|---|---|
| Autores principales: | , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Sage Publications Inc.
2012 Supplement
|
| 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=104522883&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104522883 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10519815 3RC jtl: Work issn: 10519815 maglogo: N pubinfo: dt: 2012 Supplement vid: 41 pid: 344 pub: Sage Publications Inc. place: Thousand Oaks, California artinfo: ui: 104522883 71928518 10.3233/wor-2012-0541-2897 104522883 ppf: 2897 ppct: 5 formats: fmt: @attributes: type: P tig: atl: Effects of physical and mental demands on shoulder muscle fatigue. aug: au: Soares, Marcelo M. Jacobs, Karen Mehta, Ranjana K. Agnew, Michael J. affil: Departments of Cognitive and Learning Sciences and Kinesiology and Integrative Physiology, Michigan Technological University, 1400 Townsend Drive, Houghton, MI, USA sug: subj: Muscle Fatigue Shoulder Pathology Workload Human Male Female Adult Descriptive Statistics Dynamometry P-Value Data Analysis, Statistical Data Analysis Software Analysis of Variance Post Hoc Analysis Muscle Strength Evaluation Adult: 19-44 years Male Female ab: Mental demands have been associated with increased risk of injuries; however, its influence on muscle fatigability remains unclear. The aim of this study was to investigate the interaction of mental workload and physical workload on muscle fatigability during repetitive shoulder work. Twelve young participants, balanced by gender, performed shoulder abduction exercises until exhaustions at three levels of physical workload (low (5% maximum voluntary contraction (MVC)), moderate (35% MVC), and high (55% MVC)) in the absence and presence of a mental arithmetic test. Endurance time and rate of strength decline were employed as indicators of muscle fatigue. Concurrent physical and mental processing was found to adversely decrease muscle endurance by ~25% at the moderate intensity level. Furthermore, concurrent demands were associated with faster rate of strength decline compared to the control, irrespective of the physical intensity level. Findings from the current study provide evidence of the adverse effects of mental workload on muscle capacity (i.e., endurance and fatigue). It is therefore important to consider potential changes in worker capacity with concurrent physical and cognitive demands before designing work tasks/products. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|