Dietary nitrate supplementation enhances short but not longer duration running time-trial performance
Shannon OM, Barlow MJ, Duckworth L, Williams E, Wort G, Woods D, Siervo M, O'Hara JP
European journal of applied physiology · 55 citations
How it was studied
- Design
- Randomized controlled trial (indexed by PubMed)
- Studied in
- People
- Main outcome
- Health markers and function
- Intake measured by
- Not stated
Who paid for it
- Funding
- Independent funding
- Government
- Medical Research Council
- Grants
- Medical Research Council (MR/N007921/1)
Based on 1 listed funder(s).
Publication
- Published
- 2017-03-01 · Eur J Appl Physiol · vol. 117 · issue 4 · pp. 775–785
- Publisher
- Springer Science+Business Media
- Cited
- 67 citations · more than 96% of similar papers · 5.0× the field average
- Impact
- Top 10% most cited in its field
- References
- 60 works
- Access
- Open access (hybrid journal) · CC-BY
- Research areas
- Nitric Oxide and Endothelin Effects · Exercise and Physiological Responses · Muscle metabolism and nutrition
- Keywords
- Dietary Nitrate, Medicine, Treadmill, Nitrate, Blood lactate, Internal medicine, Animal science, Blood pressure, Heart rate, Chemistry, Biology
- MeSH
- humans, beta vulgaris, nitrates, oxygen consumption, blood pressure, running, dietary supplements, adult, male, athletic performance
8 authors
From GB
- Oliver Michael Shannon · correspondingLeeds Beckett University
- Matthew BarlowLeeds Beckett University
- Lauren C. DuckworthLeeds Beckett University
- Emily L. WilliamsLeeds Beckett University
- Georgina WortLeeds Beckett University
- David Richard WoodsRoyal Navy; Royal Centre for Defence Medicine; Leeds Beckett University
Abstract
Purpose
This study evaluated the effects of dietary nitrate (NO3-) supplementation on physiological functioning and exercise performance in trained runners/triathletes conducting short and longer-distance treadmill running time-trials (TT).
Method
Eight trained male runners or triathletes completed four exercise performance tests comprising a 10 min warm up followed by either a 1500 or 10,000 m treadmill TT. Exercise performance tests were preceded 3 h before the exercise by supplementation with either 140 ml concentrated nitrate-rich (~12.5 mmol nitrate) (BRJ) or nitrate-deplete (~0.01 mmol nitrate) (PLA) beetroot juice.
Results
BRJ supplementation significantly elevated plasma [NO2-] (P 0.05). However, post-exercise blood [lactate] was significantly greater in BRJ following the 1500 m TT (6.6 ± 1.2 vs. 6.1 ± 1.5 mM; P 0.05). Performance in the 1500 m TT was significantly faster in BRJ vs. PLA (319.6 ± 36.2 vs. 325.7 ± 38.8 s; P 0.05).
Conclusion
Acute BRJ supplementation significantly enhanced 1500 m, but not 10,000 m TT performance. These findings suggest that BRJ might be ergogenic during shorter distance TTs which allow for a high work rate, but not during longer distance TTs, completed at a lower work rate.
Abstract via Europe PMC. Copyright remains with the authors or publisher (CC BY).
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