Dietary nitrate supplementation improves rowing performance in well-trained rowers
Bond H, Morton L, Braakhuis AJ
International journal of sport nutrition and exercise metabolism · 75 citations
Review labels
Neutral facts our review recorded about how this study was done. They describe method, never whether we like the result.
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
- Funding not disclosed
Publication
- Published
- 2012-08-01 · Int J Sport Nutr Exerc Metab · vol. 22 · issue 4 · pp. 251–256
- Publisher
- Human Kinetics
- Cited
- 126 citations · more than 100% of similar papers · 41.4× the field average
- Impact
- Top 10% most cited in its field
- References
- 16 works
- Access
- Paywalled
- Research areas
- Cardiovascular and exercise physiology · Muscle metabolism and nutrition · Heart Rate Variability and Autonomic Control
- Keywords
- Rowing, Time trial, Crossover study, Nitrate, Dietary Nitrate, Animal science, Placebo, Heart rate, Nitrite, Bicycle ergometer, Confidence interval, Medicine, Blood pressure, Physical therapy, Chemistry, Internal medicine, Biology
- MeSH
- humans, beta vulgaris, body weight, nitrates, nitrites, lactates, treatment outcome, exercise, cross-over studies, double-blind method, ergometry, blood pressure, exercise tolerance, hydrogen-ion concentration, dietary supplements, adolescent, diet records, male, athletes, sports nutritional physiological phenomena, fruit and vegetable juices
3 authors
From NZ
- Hannah BondWaikato Institute of Technology
- Lillian C. Morton
- Andrea Jane Braakhuis
Abstract
Increased plasma nitrate concentrations from dietary sources of nitrate have proven to benefit exercise performance. Beetroot (BR) contains relatively high levels of nitrate (NO₃⁻), which increases nitric oxide stores. This study investigated whether dietary nitrate supplementation, in the form of a BR beverage, would improve rowing performance during ergometer repetitions. In a randomized crossover design, 14 well-trained junior male rowers consumed 500 ml of either BR or placebo (PL) daily for 6 d. After supplementation, rowers completed 6 maximal 500-m ergometer repetitions and times were recorded. A 7-d washout period separated the 2 trials. Blood pressure, oxygen saturation, maximum heart rate, urine (specific gravity, pH, and nitrites), and lactates were collected for analysis at baseline and pre- and postperformance. Changes in the mean with 95% confidence limits were calculated. There was a likely benefit to average repetition time in the BR condition, compared with PL (0.4%, 95% confidence limits, ± 1.0%). In particular, Repetitions 4-6 showed an almost certain benefit in rowing time on BR (1.7%, 95% CL, ± 1.0%). The underlying mechanism for the observed results remains unknown, as differences observed in rowers' physiological measures between the 2 conditions were unclear. Conclusively, nitrate supplementation in the form of BR juice resulted in improved maximal rowing-ergometer repetitions, particularly in the later stages of exercise.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
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