Effects of load mass carried in a backpack upon respiratory muscle fatigue

Faghy, Mark, Blacker, Sam D. and Brown, Peter I. (2016) Effects of load mass carried in a backpack upon respiratory muscle fatigue. European Journal of Sport Science, 16 (8). pp. 1032-1038. ISSN 1746-1391

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Abstract

Purpose: The purpose of this study was to investigate whether loads carried in a backpack, with a load mass ranging from 0 to 20 kg, causes respiratory muscle fatigue.
Methods: Eight males performed four randomised load carriage (LC) trials comprising 60 min walking at 6.5 km∙h-1 wearing a backpack of either 0 (LC0), 10 (LC10), 15 (LC15) or 20 kg (LC20). Inspiratory (PImax) and expiratory (PEmax) mouth pressures were assessed prior to and immediately following each trial. Pulmonary gas exchange, heart rate, blood lactate and glucose concentration and perceptual responses were recorded during the first and final 60 s of each trial.
Results: Group mean PImax and PEmax were unchanged following 60 min load carriage in all conditions (p>0.05). There was an increase over time in pulmonary gas exchange, heart rate and perceptions of effort relative to baseline measures during each trial (p<0.05) with changes not different between trials (p>0.05).
Conclusions: These findings indicate that sub-maximal walking with no load or carrying 10, 15 or 20 kg in a backpack for up to 60 min does not cause respiratory muscle fatigue despite causing an increase in physiological, metabolic and perceptual parameters.

Item Type: Article
Uncontrolled Keywords: Respiratory muscle fatigue, chest wall loading, chest wall restriction, load carriage, exercise performance
Subjects: Q Science > QP Physiology
Divisions: Research Centres > CCASES
Departments > Sport and Exercise Sciences
Related URLs:
Depositing User: Sam Blacker
Date Deposited: 02 Nov 2016 14:41
Last Modified: 25 Jun 2018 15:13
URI: http://eprints.chi.ac.uk/id/eprint/2082

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