dc.contributor.author | Thompson, C | |
dc.contributor.author | Wylie, LJ | |
dc.contributor.author | Fulford, J | |
dc.contributor.author | Kelly, J | |
dc.contributor.author | Black, MI | |
dc.contributor.author | McDonagh, ST | |
dc.contributor.author | Jeukendrup, AE | |
dc.contributor.author | Vanhatalo, A | |
dc.contributor.author | Jones, AM | |
dc.date.accessioned | 2016-11-02T14:21:17Z | |
dc.date.issued | 2015-04-07 | |
dc.description.abstract | UNLABELLED: It is possible that dietary nitrate (NO3 (-)) supplementation may improve both physical and cognitive performance via its influence on blood flow and cellular energetics. PURPOSE: To investigate the effects of dietary NO3 (-) supplementation on exercise performance and cognitive function during a prolonged intermittent sprint test (IST) protocol, which was designed to reflect typical work patterns during team sports. METHODS: In a double-blind randomised crossover study, 16 male team-sport players received NO3 (-)-rich (BR; 140 mL day(-1); 12.8 mmol of NO3 (-)), and NO3 (-)-depleted (PL; 140 mL day(-1); 0.08 mmol NO3 (-)) beetroot juice for 7 days. On day 7 of supplementation, subjects completed the IST (two 40-min "halves" of repeated 2-min blocks consisting of a 6-s "all-out" sprint, 100-s active recovery and 20 s of rest), on a cycle ergometer during which cognitive tasks were simultaneously performed. RESULTS: Total work done during the sprints of the IST was greater in BR (123 ± 19 kJ) compared to PL (119 ± 17 kJ; P < 0.05). Reaction time of response to the cognitive tasks in the second half of the IST was improved in BR compared to PL (BR first half: 820 ± 96 vs. second half: 817 ± 86 ms; PL first half: 824 ± 114 vs. second half: 847 ± 118 ms; P < 0.05). There was no difference in response accuracy. CONCLUSIONS: These findings suggest that dietary NO3 (-) enhances repeated sprint performance and may attenuate the decline in cognitive function (and specifically reaction time) that may occur during prolonged intermittent exercise. | en_GB |
dc.description.sponsorship | This study was supported by a grant from PepsiCo, Il USA. Jonathan Fulford’s salary was supported via an NIHR grant. The authors thank Beet It Ltd. for providing the beverages used in this study gratis. | en_GB |
dc.identifier.citation | Vol. 115, Iss. 9, pp. 1825 - 1834 | en_GB |
dc.identifier.doi | 10.1007/s00421-015-3166-0 | |
dc.identifier.uri | http://hdl.handle.net/10871/24222 | |
dc.language.iso | en | en_GB |
dc.publisher | Springer Verlag (Germany) | en_GB |
dc.relation.url | http://www.ncbi.nlm.nih.gov/pubmed/25846114 | en_GB |
dc.rights | This is the author accepted manuscript. The final version is available from Springer Verlag via the DOI in this record. | en_GB |
dc.subject | Administration, Oral | en_GB |
dc.subject | Athletic Performance | en_GB |
dc.subject | Cognition | en_GB |
dc.subject | Dietary Supplements | en_GB |
dc.subject | Double-Blind Method | en_GB |
dc.subject | Exercise | en_GB |
dc.subject | Humans | en_GB |
dc.subject | Nitrates | en_GB |
dc.subject | Physical Exertion | en_GB |
dc.subject | Running | en_GB |
dc.subject | Treatment Outcome | en_GB |
dc.subject | Young Adult | en_GB |
dc.title | Dietary nitrate improves sprint performance and cognitive function during prolonged intermittent exercise. | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2016-11-02T14:21:17Z | |
dc.identifier.issn | 1439-6319 | |
pubs.declined | 2016-11-02T14:12:34.162+0000 | |
pubs.deleted | 2016-11-02T14:12:34.162+0000 | |
exeter.place-of-publication | Germany | en_GB |
dc.description | Published | en_GB |
dc.description | Journal Article | en_GB |
dc.description | Randomized Controlled Trial | en_GB |
dc.description | Research Support, Non-U.S. Gov't | en_GB |
dc.identifier.eissn | 1439-6327 | |
dc.identifier.journal | European Journal of Applied Physiology | en_GB |