Dietary Nitrate Fails to Improve 1 and 4 km Cycling Performance in Highly Trained Cyclists
McQuillan JA, Dulson DK, Laursen PB, Kilding AE
International journal of sport nutrition and exercise metabolism · 23 citas
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 independiente
- Universidad u hospital
- Johns Hopkins University
Según 1 financiador declarado.
Publicación
- Publicado
- 2016-12-20 · Int J Sport Nutr Exerc Metab · vol. 27 · número 3 · págs. 255–263
- Editorial
- Human Kinetics
- Citado
- 30 citas · más que el 98% de estudios similares · 10.7× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 0 trabajos
- Acceso
- De pago
- Áreas de investigación
- Cardiovascular and exercise physiology · Pharmacological Effects and Assays · Muscle metabolism and nutrition
- Palabras clave
- Time trial, Placebo, Cycling, Crossover study, Dosing, Medicine, Animal science, Physical therapy, Internal medicine, Biology, Blood pressure, Heart rate
- MeSH
- humans, beta vulgaris, nitrates, nitric oxide, cross-over studies, double-blind method, oxygen consumption, bicycling, dietary supplements, adult, male, athletic performance, young adult, athletes, sports nutritional physiological phenomena, fruit and vegetable juices
4 autores
- Joseph A. McQuillan
- Deborah K. Dulson
- Paul B. Laursen
- Andrew Edward Kilding
Resumen
El texto original del estudio, en el idioma en que se publicó.
We aimed to compare the effects of two different dosing durations of dietary nitrate (NO3-) supplementation on 1 and 4 km cycling time-trial performance in highly trained cyclists. In a double-blind crossover-design, nine highly trained cyclists ingested 140ml of NO3- -rich beetroot juice containing ~8.0mmol [NO3-], or placebo, for seven days. Participants completed a range of laboratory-based trials to quantify physiological and perceptual responses and cycling performance: time-trials on day 3 and 6 (4km) and on day 4 and 7 (1km) of the supplementation period. Relative to placebo, effects following 3- and 4-days of NO3- supplementation were unclear for 4 (-0.8; 95% CL, ± 2.8%, p = .54) and likely harmful for 1km (-1.9; ± 2.5% CL, p = .17) time-trial mean power. Effects following 6- and 7-days of NO3- supplementation resulted in unclear effects for 4 (0.1; ± 2.2% CL, p = .93) and 1km (-0.9; ± 2.6%CL, p = .51) time-trial mean power. Relative to placebo, effects for 40, 50, and 60% peak power output were unclear for economy at days 3 and 6 of NO3- supplementation (p > .05). Dietary NO3- supplementation appears to be detrimental to 1km time-trial performance in highly trained cyclists after 4-days. While, extending NO3- dosing to ≥ 6-days reduced the magnitude of harm in both distances, overall performance in short duration cycling time-trials did not improve relative to placebo.
Resumen vía Europe PMC. Los derechos de autor siguen siendo de los autores o la editorial.
Confianza de la comunidad
Cargando…
¿Cuánto confías en los hallazgos de este estudio?
Comentarios
¿Algo está mal aquí?
Señala este estudio si su información, etiquetas o financiación parecen incorrectas. Un editor revisa cada señalamiento.
Información educativa sobre investigación publicada. No es consejo médico ni una recomendación para empezar o dejar nada.