Effects of load mass carried in a backpack upon respiratory muscle fatigue
Journal article
Authors | Faghy, Mark, Blacker, Sam D. and Brown, Peter I. |
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Abstract | 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 (HR), 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 > .05). There was an increase over time in pulmonary gas exchange, HR and perceptions of effort relative to baseline measures during each trial (p < .05) with changes not different between trials (p > .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. |
Keywords | Load carriage; Respiratory system; Respiratory muscle training; Exercise performance |
Year | 2016 |
Journal | European Journal of Sport Science |
Journal citation | 16 (8), pp. 1032-1038 |
Publisher | Taylor & Francis |
ISSN | 15367290 |
Digital Object Identifier (DOI) | https://doi.org/10.1080/17461391.2016.1202326 |
Web address (URL) | https://www.tandfonline.com/doi/full/10.1080/17461391.2016.1202326 |
http://hdl.handle.net/10545/621199 | |
hdl:10545/621199 | |
Output status | Published |
Publication dates | 05 Jul 2016 |
Publication process dates | |
Accepted | 10 Jun 2016 |
Deposited | 20 Dec 2016 |
Rights | Archived with thanks to European Journal of Sport Science |
Contributors | University of Derby |
File | File Access Level Open |
File |
https://repository.derby.ac.uk/item/95222/effects-of-load-mass-carried-in-a-backpack-upon-respiratory-muscle-fatigue
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