NDLI: Dietary nitrate supplementation improves team sport-specific intense intermittent exercise performance

Content Provider	Springer Nature Link
Author	Wylie, Lee J. Mohr, Magni Krustrup, Peter Jackman, Sarah R. Ermιdis, Georgios Kelly, James Black, Matthew I. Bailey, Stephen J. Vanhatalo, Anni Jones, Andrew M.
Copyright Year	2013
Abstract	Recent studies have suggested that dietary inorganic nitrate (NO3 −) supplementation may improve muscle efficiency and endurance exercise tolerance but possible effects during team sport-specific intense intermittent exercise have not been examined. We hypothesized that NO3 − supplementation would enhance high-intensity intermittent exercise performance. Fourteen male recreational team-sport players were assigned in a double-blind, randomized, crossover design to consume 490 mL of concentrated, nitrate-rich beetroot juice (BR) and nitrate-depleted placebo juice (PL) over ~30 h preceding the completion of a Yo–Yo intermittent recovery level 1 test (Yo–Yo IR1). Resting plasma nitrite concentration ([NO2 −]) was ~400 % greater in BR compared to PL. Plasma [NO2 −] declined by 20 % in PL (P < 0.05) and by 54 % in BR (P < 0.05) from pre-exercise to end-exercise. Performance in the Yo–Yo IR1 was 4.2 % greater (P < 0.05) with BR (1,704 ± 304 m) compared to PL (1,636 ± 288 m). Blood [lactate] was not different between BR and PL, but the mean blood [glucose] was lower (3.8 ± 0.8 vs. 4.2 ± 1.1 mM, P < 0.05) and the rise in plasma [K+] tended to be reduced in BR compared to PL (P = 0.08). These findings suggest that NO3 − supplementation may promote NO production via the nitrate-nitrite-NO pathway and enhance Yo–Yo IR1 test performance, perhaps by facilitating greater muscle glucose uptake or by better maintaining muscle excitability. Dietary NO3 − supplementation improves performance during intense intermittent exercise and may be a useful ergogenic aid for team sports players.
Starting Page	1673
Ending Page	1684
Page Count	12
File Format	PDF
ISSN	14396319
Journal	European Journal of Applied Physiology
Volume Number	113
Issue Number	7
e-ISSN	14396327
Language	English
Publisher	Springer-Verlag
Publisher Date	2013-02-01
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Repeated high-intensity exercise Nitric oxide Team sports Ergogenic aids Human Physiology Occupational Medicine/Industrial Medicine Sports Medicine
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physiology (medical) Public Health, Environmental and Occupational Health Sports Science

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