Influence of dietary nitrate supplementation on physiological and cognitive responses to incremental cycle exercise

Thompson, K. G., Turner, Louise A ORCID: 0000-0002-0153-7075, Pritchard, J., Dodd, F., Kennedy, D. O., Haskell, C., Blackwell, J. R. and Jones, A. M. (2014) Influence of dietary nitrate supplementation on physiological and cognitive responses to incremental cycle exercise. Respiratory Physiology and Neurobiology, 193 (1). pp. 11-20. ISSN 1569-9048

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Abstract

Dietary inorganic nitrate supplementation causes physiological effects which may enhance exercise tolerance. However it is not known whether nitrate might alter cognitive function during exercise. In a double-blind, cross-over study, sixteen subjects ingested either nitrate-rich beetroot juice or a placebo and completed a continuous cycle exercise test involving 20min stages at 50% and 70% V˙O2peak and a final stage at 90% V˙O2peak until volitional exhaustion. Cognitive tasks were completed before, during and after exercise. In the dietary nitrate condition: plasma [nitrite] increased (p<0.01), systolic blood pressure decreased (p<0.05) and there was a trend for a reduced oxygen uptake at 50% V˙O2peak. Tissue oxygenation improved across exercise intensities and exercise tolerance was greater at 90% V˙O2peak (p<0.05). Rating of perceived exertion, energy levels and cognitive performance were similar between conditions with mental fatigue being evident from 70% V˙O2peak onwards (p<0.05). Dietary nitrate supplementation enhanced short-term endurance exercise performance with concomitant mental fatigue but did not improve cognitive performance post-fatigue.

Item Type: Article
Article Type: Article
Uncontrolled Keywords: Dietary Nitrate; Exercise Tolerance; Cognitive Function
Related URLs:
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports > GV1040 Cycling. Bicycling. Motorcycling
G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports
Divisions: Schools and Research Institutes > School of Sport and Exercise > Applied Sport & Exercise Sciences
Research Priority Areas: Sport, Exercise, Health & Wellbeing
Depositing User: Kate Greenaway
Date Deposited: 07 Feb 2020 09:31
Last Modified: 07 Feb 2020 09:45
URI: http://eprints.glos.ac.uk/id/eprint/8110

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