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 citas
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Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
- Consumo medido con
- No se indica
Quién lo pagó
- Financiación
- Financiación no declarada
Publicación
- Publicado
- 2012-08-01 · Int J Sport Nutr Exerc Metab · vol. 22 · número 4 · págs. 251–256
- Editorial
- Human Kinetics
- Citado
- 126 citas · más que el 100% de estudios similares · 41.4× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 16 trabajos
- Acceso
- De pago
- Áreas de investigación
- Cardiovascular and exercise physiology · Muscle metabolism and nutrition · Heart Rate Variability and Autonomic Control
- Palabras clave
- 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 autores
- Hannah Bond🇳🇿Waikato Institute of Technology
- Lillian C. Morton
- Andrea Jane Braakhuis
Resumen
El texto original del estudio, en el idioma en que se publicó.
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.
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