PMID: 9648174Jul 2, 1998Paper

Breathing patterns and heart rate during simulated occupational upper limb tasks in normal subjects

Physiotherapy Research International : the Journal for Researchers and Clinicians in Physical Therapy
M MackeyM Nicholls

Abstract

Despite the arms being used extensively in the performance of many occupational tasks, little is known about the pattern of breathing and physiological cost of such work. The purpose of this study was to establish whether a simple change in arm support could alter the workload, pattern of breathing and respiratory muscle recruitment during a low intensity arm task. Ten normal subjects performed a simulated work task when sitting, once with the arms supported and once unsupported. Subjects were required, over a five-minute period, to repeatedly pick up a 2 kg object, inspect and hold it for 15 seconds and then pack it in a box. Breathing pattern responses, measured by pneumotachograph and respiratory inductive plethysmography, were minute ventilation (VE), respiratory frequency (Rf), tidal volume (VT) and change in functional residual capacity (FRC). The main findings were that unsupported arm work was more physiologically demanding than supported arm work. During work VE increased as a result of a change in respiratory frequency but not VT which was much more limited when the arms were unsupported. At the completion of activity, when the arms were unloaded, VT initially increased as VE decreased. FRC and VT were reduced during ...Continue Reading

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Citations

Feb 16, 2005·Journal of Abnormal Psychology·Georg W AlpersWalton T Roth
Jun 25, 2008·Physiotherapy Theory and Practice·Maureen P McEvoyMarie T Williams
Jun 5, 2003·Journal of Cardiopulmonary Rehabilitation·Zoe J McKeoughPeter T P Bye
Dec 1, 2017·Experimental Brain Research·Ranjit Kumar Mal

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