Dietary nitrate supplementation does not improve cycling time-trial performance in the heat
Kent GL, Dawson B, Cox GR, Burke LM, Eastwood A, Croft KD, Peeling P
Journal of sports sciences · 14 citations
How it was studied
- Design
- Randomized controlled trial (classified by our AI screen)
- Studied in
- People
- Main outcome
- Health markers and function
- Intake measured by
- Not stated
Who paid for it
- Funding
- Independent funding
- Government
- Australian Institute of Sport
Based on 1 listed funder(s).
Publication
- Published
- 2017-08-07 · J Sports Sci · vol. 36 · issue 11 · pp. 1204–1211
- Publisher
- Taylor & Francis
- Cited
- 15 citations · more than 89% of similar papers · 2.7× the field average
- References
- 35 works
- Access
- Paywalled
- Research areas
- Cardiovascular and exercise physiology · Exercise and Physiological Responses · Muscle metabolism and nutrition
- Keywords
- Nitrite, Time trial, Cycling, Thermoregulation, Dietary Nitrate, Placebo, Animal science, Nitrate, Chemistry, Internal medicine, Endocrinology, Medicine, Heart rate, Biology, Blood pressure
- MeSH
- saliva, humans, nitrates, nitrites, exercise test, double-blind method, perception, body temperature regulation, skin temperature, heart rate, bicycling, dietary supplements, adult, male, athletic performance, physical exertion, hot temperature, fruit and vegetable juices
7 authors
From AU
- Georgina L. Kent · correspondingThe University of Western Australia
- BRIAN T. DAWSONThe University of Western Australia
- Gregory R. Cox
- Louise M. Burke
- Annette Eastwood
- Kevin D. CroftThe University of Western Australia; Royal Perth Hospital
Abstract
This investigation examined the effect of beetroot juice (BR) supplementation, a source of dietary nitrate (NO3-), on cycling time-trial (TT) performance and thermoregulation in the heat. In a double-blind, repeated-measures design, 12 male cyclists (age 26.6 ± 4.4 years, VO2peak 65.8 ± 5.5 mL.kg-1.min-1) completed four cycling TTs (14 kJ.kg-1) in hot (35°C, 48% relative humidity) and euthermic (21°C, 52%) conditions, following 3 days supplementation with BR (6.5 mmol NO3- for 2 days and 13 mmol NO3- on the final day), or NO3-depleted placebo (PLA). Salivary NO3- and nitrite, core (Tc) and mean skin temperature (Tsk) were measured. Salivary NO3- and nitrite increased significantly post-BR supplementation (p c (p sk (p < 0.001) were higher in hot compared with euthermic conditions. In summary, BR supplementation has no significant effect on cycling TT performance in the heat.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
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