Effects of dietary nitrate on the O2 cost of submaximal exercise: Accounting for "noise" in pulmonary gas exchange measurements
Tan R, Wylie LJ, Wilkerson DP, Vanhatalo A, Jones AM
Journal of sports sciences · 5 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
- Sin clasificar
- that there is no funding
Según 1 financiador declarado.
Publicación
- Publicado
- 2022-03-18 · J Sports Sci · vol. 40 · número 10 · págs. 1149–1157
- Editorial
- Taylor & Francis
- Citado
- 8 citas · más que el 82% de estudios similares · 1.7× el promedio de su campo
- Referencias
- 68 trabajos
- Acceso
- Acceso abierto (revista híbrida) · CC-BY
- Áreas de investigación
- Cardiovascular and exercise physiology · Exercise and Physiological Responses · Muscle metabolism and nutrition
- Palabras clave
- dietary nitrate, beetroot juice, submaximal exercise, oxygen cost, oxygen uptake kinetics, signal-to-noise ratio, pulmonary gas exchange, step transitions, ensemble averaging, steady-state oxygen uptake, exercise intensity
- MeSH
- humans, beta vulgaris, nitrates, nitrites, oxygen, pulmonary gas exchange, cross-over studies, double-blind method, oxygen consumption, exercise tolerance, dietary supplements
5 autores
- Rachel Tan🇬🇧University of Exeter
- Lee J. Wylie🇬🇧University of Exeter
- Daryl P. Wilkerson🇬🇧University of Exeter
- Anni Vanhatalo🇬🇧University of Exeter
- ANDREW MARK JONES🇬🇧 · autor de correspondenciaUniversity of Exeter
Resumen
El texto original del estudio, en el idioma en que se publicó.
Dietary nitrate (NO3-) supplementation can reduce the oxygen cost of submaximal exercise, but this has not been reported consistently. We hypothesised that the number of step transitions to moderate-intensity exercise, and corresponding effects on the signal-to-noise ratio for pulmonary V˙ O2, may be important in this regard. Twelve recreationally active participants were assigned in a randomised, double-blind, crossover design to supplement for 4 days in three conditions: 1) control (CON; water); 2); PL (NO3--depleted beetroot juice); and 3) BR (NO3--rich beetroot juice). On days 3 and 4, participants completed two 6-min step transitions to moderate-intensity cycle exercise. Breath-by-breath V˙ O2 data were collected and V˙ O2 kinetic responses were determined for a single transition and when the responses to 2, 3 and 4 transitions were ensemble-averaged. Steady-state V˙ O2 was not different between PL and BR when the V˙ O2 response to one-, two- or three-step transition was compared but was significantly lower in BR compared to PL when four-step transitions was considered (PL: 1.33 ± 0.34 vs. BR: 1.31 ± 0.34 L·min-1, P 2 responses between CON and PL (P > 0.05). Multiple step transitions may be required to detect the influence of NO3- supplementation on steady-state V˙ O2.
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