The Influence of task variation on manifestation of fatigue is ambiguous - a literature review

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<title>Influence of task variation on manifestation of fatigue is ambiguous - a literature review</title>
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<abstract displayLabel="Summary">Task variation has been proposed to reduce shoulder fatigue resulting from repetitive handarm tasks. This review analyses the effect of task variation, both temporal (i.e. change of workrest ratio)¿ and activity (i.e. job rotation)¿ variation, on physiological responses, endurance time (ET) and subjective feelings. Pubmed was searched and complemented with references from selected articles, resulting in 17 articles. Temporal variation had some positive effects on the objective parameters, as blood pressure decreased and ET increased, and on the subjective feelings, as perceived discomfort decreased. The observed findings of activity variation showed both positive and negative effects of increased activity variation, while hardly any effects were found on electromyography manifestations of fatigue. In conclusion, the evidence for positive effects of increasing the level of variation is scarce. The number of studies on variation is limited, while in most studies the findings were not controlled for the amount or intensity of work.</abstract>
<note type="statement of responsibility">Tessy Luger...[et.al]</note>
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<title>Ergonomics : the international journal of research and practice in human factors and ergonomics</title>
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<publisher>Oxon [United Kingdom] : Taylor & Francis, 2010-</publisher>
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<identifier type="issn">0014-0139</identifier>
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<text>03/02/2014 Volumen 57 Número 2 - febrero 2014 </text>
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