Increase in Maximal Cycling Power With Acute Dietary Nitrate Supplementation
Rimer EG, Peterson LR, Coggan AR, Martin JC
International journal of sports physiology and performance · 61 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
- Nonprofit
- Foundation for Barnes-Jewish Hospital
- University or hospital
- Institute of Clinical and Translational Sciences
- Government
- National Institutes of Health
- Government
- National Center for Advancing Translational Sciences
- Government
- NCATS NIH HHS
- Grants
- Institute of Clinical and Translational Sciences (UL1TR000448); National Center for Advancing Translational Sciences (UL1-TR-000448); Foundation for Barnes-Jewish Hospital (UL1 TR000448); National Center for Advancing Translational Sciences (TR000448); National Institutes of Health (UL1‐TR000448); National Institutes of Health (TR000448)
Based on 5 listed funder(s).
Publication
- Published
- 2015-12-04 · Int J Sports Physiol Perform · vol. 11 · issue 6 · pp. 715–720
- Publisher
- Human Kinetics
- Cited
- 82 citations · more than 99% of similar papers · 17.2× the field average
- Impact
- Top 10% most cited in its field
- References
- 32 works
- Access
- Open access (repository copy)
- Research areas
- Cardiovascular and exercise physiology · Muscle metabolism and nutrition · Heart Rate Variability and Autonomic Control
- Keywords
- Cycling, Animal science, Crossover study, Dietary Nitrate, Analysis of variance, Medicine, Ingestion, Time trial, Internal medicine, Chemistry, Nitrite, Nitrate, Heart rate, Biology, Blood pressure, Placebo
- MeSH
- muscle, skeletal, humans, nitrates, plant extracts, exercise test, cross-over studies, double-blind method, dietary supplements, adult, female, male, muscle strength, athletic performance, young adult, athletes, sports nutritional physiological phenomena
4 authors
From US
- Ernest G. Rimer · correspondingUniversity of Utah
- Linda R. PetersonWashington University in St. Louis
- Andrew R. CogganWashington University in St. Louis
- James C. MartinUniversity of Utah
Abstract
Muscle-shortening velocity and hence power have been shown to increase in the presence of nitric oxide (NO). NO availability increases after consuming nitrate (NO3-). Ingestion of NO3-rich beetroot juice (BRJ) has increased muscle power in untrained adults.
Purpose
This study determined whether NO3- supplementation could acutely enhance maximal power in trained athletes.
Methods
In this double-blind, crossover study, 13 trained athletes performed maximal inertial-load cycling trials (3-4 s) immediately before (PRE) and after (POST) consuming either NO3-rich (NO3) or NO3-depleted (PLA) BRJ to assess acute changes (ie, within the same day) in maximal power (PMAX) and optimal pedaling rate (RPMopt). Participants also performed maximal isokinetic cycling (30 s) to assess performance differences after supplementation.
Results
2 x 2 repeated-measures ANOVA indicated a greater increase in PMAX from PRE to POST NO3 (PRE 1160 ± 301 W to POST 1229 ± 317 W) than with PLA (PRE 1191 ± 298 W to POST 1213 ± 300 W) (P = .009; ηp2 = 0.45). A paired t-test verified a greater relative change in PMAX after NO3 (6.0% ± 2.6%) than with PLA (2.0% ± 3.8%) (P = .014; d = 1.21). RPMopt remained unchanged from PRE (123 ± 14 rpm) to POST PLA (122 ± 14 rpm) but increased from PRE (120 ± 14 rpm) to POST NO3 (127 ± 13 rpm) (P = .043; ηp2 = 0.30). There was no relative change in RPMopt after PLA (-0.3% ± 4.1%), but there was an increase after NO3 (6.5% ± 11.4%) (P = .049; d = 0.79). No differences were observed between the 30-s isokinetic trials.
Conclusions
Acute NO3- supplementation can enhance maximal muscle power in trained athletes. These findings may particularly benefit power-sport athletes who perform brief explosive actions.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
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