Influence of acute dietary nitrate supplementation on oxygen delivery/consumption and critical impulse during maximal effort forearm exercise in males: a randomized crossover trial
Fenuta A, Drouin P, Kohoko Z, Lynn M, Tschakovsky M
Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme · 1 cita
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
- School of Graduate Studies, Utah State University
- Gobierno
- Ontario Innovation Trust
- Universidad u hospital
- Queen's University
- Gobierno
- Natural Sciences and Engineering Research Council of Canada
- Gobierno
- NSERC
- Universidad u hospital
- Queen’s University
- Universidad u hospital
- School of Graduate Studies
- Gobierno
- Canadian Foundation for Innovation
- Sin clasificar
- Bruce Mitchell
- Subvenciones
- Natural Sciences and Engineering Research Council of Canada (EQPEQ0407690-11); Natural Sciences and Engineering Research Council of Canada (RGPIN/05078-2016)
Según 9 financiadores declarados.
Publicación
- Publicado
- 2024-05-11 · Appl Physiol Nutr Metab · vol. 49 · número 9 · págs. 1184–1201
- Editorial
- NRC Research Press
- Citado
- 1 cita · más que el 64% de estudios similares · 0.4× el promedio de su campo
- Referencias
- 94 trabajos
- Acceso
- De pago
- Áreas de investigación
- Cardiovascular and exercise physiology · Exercise and Physiological Responses · Muscle metabolism and nutrition
- Palabras clave
- dietary nitrate, beetroot juice, oxygen delivery, oxygen consumption, oxygen extraction, handgrip exercise, nitric oxide bioavailability, muscle deoxygenation, muscle acidosis, work capacity
- MeSH
- forearm, muscle, skeletal, humans, beta vulgaris, nitrates, hand strength, exercise, cross-over studies, oxygen consumption, dietary supplements, adolescent, male, young adult, fruit and vegetable juices
5 autores
- Alyssa M. Fenuta🇨🇦Queen's University
- Patrick J. Drouin🇨🇦Queen's University
- Zach I.N. Kohoko🇨🇦Queen's University
- Mytchel J.T. Lynn🇨🇦Queen's University
- Michael E. Tschakovsky🇨🇦Queen's University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Beetroot juice supplementation (BRJ) should increase nitric oxide bioavailability under conditions of muscle deoxygenation and acidosis that are a normal consequence of the maximal effort exercise test used to identify forearm critical impulse. We hypothesized BRJ would improve oxygen delivery:demand matching and forearm critical impulse performance. Healthy males (20.8 ± 2.4 years) participated in a randomized crossover trial between October 2017 and May 2018 (Queen's University, Kingston, ON). Participants completed 10 min of rhythmic maximal effort forearm handgrip exercise 2.5 h post placebo (PL) vs. BRJ (9 completed PL/BRJ vs. 4 completed BRJ/PL) within a 2 week period. Data are presented as mean ± SD. There was a main effect of drink (PL > BRJ) for oxygen extraction (P = 0.033, ηp2 = 0.351) and oxygen consumption/force (P = 0.017, ηp2 = 0.417). There was a drink × time interaction (PL > BRJ) for oxygen consumption/force (P = 0.035, ηp2 = 0.216) between 75 and 360 s (1.25-6 min) from exercise onset. BRJ did not influence oxygen delivery (P = 0.953, ηp2 = 0.000), oxygen consumption (P = 0.064, ηp2 = 0.278), metabolites ((lactate) (P = 0.196, ηp2 = 0.135), pH (P = 0.759, ηp2 = 0.008)) or power-duration performance parameters (critical impulse (P = 0.379, d = 0.253), W' (P = 0.733, d = 0.097)). BRJ during all-out handgrip exercise does not influence oxygen delivery or exercise performance. Oxygen cost of contraction with BRJ is reduced as contraction impulse is declining during maximal effort exercise resulting in less oxygen extraction.
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