Effects of Dietary Nitrate Supplementation on High-Intensity Cycling Sprint Performance in Recreationally Active Adults: A Systematic Review and Meta-Analysis

Tan, Rachel and Cass, Jordan K. and Lincoln, Isabella G. and Wideen, Lauren E. and Nicholl J., Madelyn and Molnar J., Trevor and Gough, Lewis A. and Bailey, Stephen J. and Adam, Pennell (2024) Effects of Dietary Nitrate Supplementation on High-Intensity Cycling Sprint Performance in Recreationally Active Adults: A Systematic Review and Meta-Analysis. Nutrients, 16 (16). ISSN 2072-6643

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Abstract

This systematic review and meta-analysis investigated the influence of dietary nitrate supplementation on performance metrics during cycling sprint exercise according to the PRISMA guidelines. Searches were conducted on MEDLINE, PubMed, ScienceDirect, Scopus, and SPORTDiscus databases up to September 2023. Inclusion criteria were healthy recreationally active men and women who consumed nitrate-rich and nitrate-deficient beetroot juice to assess performance outcomes of mean power, peak power, time-to-peak power, and minimum power during 30-s cycling sprints. Risk of bias was assessed using the Cochrane Risk of Bias 2 and TESTEX tools and funnel plots. A random effects model was performed on six studies and showed that dietary nitrate had significant effects on time-to-peak power (SMD: −0.66, 95% CI: −1.127 to −0.192, p = 0.006) but not on mean power, peak power, or minimum power. Subgroup analysis revealed that an acute low nitrate dose improved time-to-peak power (SMD: −0.977, 95% CI: −1.524 to −0.430, p < 0.001) but not after a multiday moderate nitrate dose (SMD: −0.177, 95% CI: −0.619 to −0.264, p = 0.431). These data suggest that acute nitrate supplementation can benefit time-to-peak power during 30-s cycling sprints, but due to the limited availability of data and heterogeneity in methodology, these results should be interpreted with caution. There was insufficient data on women to analyze sex-based differences. Future studies are required to provide insight on how supplementation regimen and population impact the effects of dietary nitrate for enhancing cycling sprint performance.

Item Type: Article
Identification Number: 10.3390/nu16162764
Dates:
Date
Event
9 August 2024
Accepted
19 August 2024
Published Online
Uncontrolled Keywords: nitric oxide, beetroot, ergogenic aid, power
Subjects: CAH03 - biological and sport sciences > CAH03-02 - sport and exercise sciences > CAH03-02-01 - sport and exercise sciences
Divisions: Faculty of Health, Education and Life Sciences > Centre for Life and Sport Sciences (C-LASS)
Depositing User: Lewis Gough
Date Deposited: 06 Sep 2024 13:46
Last Modified: 06 Sep 2024 13:46
URI: https://www.open-access.bcu.ac.uk/id/eprint/15764

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