An acute dose of inorganic dietary nitrate does not improve high-intensity, intermittent exercise performance in temperate or hot and humid conditions
Smith K, Muggeridge DJ, Easton C, Ross MD
European journal of applied physiology · 22 citas
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (clasificado por nuestro filtro de IA)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
- Consumo medido con
- No se indica
Quién lo pagó
- Financiación
- Financiación independiente
Según la declaración de financiación del texto completo.
Publicación
- Publicado
- 2019-01-08 · Eur J Appl Physiol · vol. 119 · número 3 · págs. 723–733
- Editorial
- Springer Science+Business Media
- Citado
- 30 citas · más que el 88% de estudios similares · 2.5× el promedio de su campo
- Referencias
- 58 trabajos
- Acceso
- Acceso abierto (revista híbrida) · CC-BY
- Áreas de investigación
- Exercise and Physiological Responses · Cardiovascular and exercise physiology · Thermoregulation and physiological responses
- Palabras clave
- Dietary Nitrate, Sprint, Medicine, Placebo, Crossover study, Animal science, Nitrate, Internal medicine, Physical therapy, Chemistry, Biology
- MeSH
- humans, nitrates, exercise, cross-over studies, heart rate, running, dietary supplements, adult, male, athletic performance, hot temperature, young adult, fruit and vegetable juices
4 autores
- Kieran Smith🇬🇧Edinburgh Napier University; Newcastle University
- David Joseph Muggeridge🇬🇧University of the Highlands and Islands
- Chris Easton🇬🇧University of the West of Scotland
- Mark Ross🇬🇧 · autor de correspondenciaEdinburgh Napier University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
Dietary nitrate (NO3-) has repeatedly been shown to improve endurance and intermittent, high-intensity events in temperate conditions. However, the ergogenic effects of dietary NO3- on intermittent exercise performance in hot conditions have yet to be investigated.
Methods
In a randomised, counterbalanced, double-blind crossover study, 12 recreationally trained males ingested a nitrate-rich beetroot juice shot (BRJ) (6.2 mmol NO3-) or a nitrate-depleted placebo (PLA) (3-) 3 h prior to an intermittent sprint test (IST) in temperate (22 °C, 35% RH) and hot conditions (30 °C, 70% RH). The cycle ergometer IST consisted of twenty maximal 6 s sprints interspersed by 114 s of active recovery. Work done, power output, heart rate and RPE were measured throughout; tympanic temperature was measured prior to and upon completion.
Results
There were no significant effects of supplement on sprint performance in either temperate or hot, humid conditions (p > 0.05). There was a reduced peak (BRJ: 659 ± 100W vs. PLA: 693 ± 139W; p = 0.056) and mean power (BRJ: 543 ± 29W vs. PLA: 575 ± 38W; p = 0.081) following BRJ compared to PLA in the hot and humid condition, but this was not statistically significant. There was no effect of supplement on total work done irrespective of environmental condition. However, ~ 75% of participants experienced performance decreases following BRJ in the hot and humid environment. No differences were observed between trials for tympanic temperature measured at the conclusion of the exercise trial.
Conclusion
In conclusion, an acute dose of inorganic dietary NO3- does not improve repeated-sprint performance in either temperate, or hot and humid conditions.
Resumen vía Europe PMC. Los derechos de autor siguen siendo de los autores o la editorial (CC BY).
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.