Effects of Dietary Nitrate and Caffeine on End Power and Work Above End Power During a 3 min All-Out Test in Trained Male Cyclists
Hagele AM, Sunderland KL, Mumford PW, Kerksick CM
Nutrients · 0 citas
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación independiente
- Universidad u hospital
- Lindenwood University
Según 1 financiador declarado y la declaración de financiación del texto completo.
Publicación
- Publicado
- 2026-05-02 · Nutrients · vol. 18 · número 9 · pág. 1463
- Editorial
- Multidisciplinary Digital Publishing Institute
- Citado
- 0 citas · más que el 28% de estudios similares · 0.0× el promedio de su campo
- Referencias
- 31 trabajos
- Acceso
- Acceso abierto (revista) · CC-BY
- Áreas de investigación
- Sports Performance and Training · Cardiovascular and exercise physiology · Coffee research and impacts
- Palabras clave
- dietary nitrate, caffeine, beetroot juice, all-out test, trained cyclists, peak power, acute supplementation, cycling performance
- MeSH
- humans, beta vulgaris, nitrates, caffeine, exercise test, cross-over studies, double-blind method, oxygen consumption, bicycling, dietary supplements, adult, male, athletic performance, fruit and vegetable juices
4 autores
- Anthony M. Hagele🇺🇸Lindenwood University
- Kyle L. Sunderland🇺🇸Lindenwood University
- Petey W. Mumford🇺🇸Pacific Northwest University of Health Sciences
- Chad M. Kerksick🇺🇸 · autor de correspondenciaLindenwood University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background
The purpose of this study was to examine the effects of acute dietary nitrate (NO3-) and caffeine (CAF) supplementation on end power (EP) and work performed above EP (WEP) in trained male cyclists during a 3 min all-out test (3MT) on a cycle ergometer.
Methods
Fifteen healthy, trained male cyclists (28.5 ± 5.3 years, 79.2 ± 9.1 kg, VO2peak 55.2 ± 5.6 mL·kg-1·min-1) completed four exercise trials in a randomized, double-blind, placebo-controlled, crossover study design separated by 3-7 days. The four experimental conditions were placebo beverage (nitrate-depleted) + placebo capsule, nitrate-rich beetroot juice + placebo capsule (BR), placebo beverage + caffeine capsule (CAF), and nitrate-rich beetroot juice + caffeine capsule (BR + CAF). Participants consumed nitrate-rich beetroot juice (~13 mmol NO3-) or nitrate-depleted placebo three hours before exercise, and caffeine (5 mg∙kg-1) or maltodextrin placebo one hour before testing. EP and WEP were determined from the 3MT. Secondary outcomes included peak and mean power output. Data were analyzed using a repeated-measures ANOVA with repeated measures on condition. A p-value of 0.05 was used to determine statistical significance. Effect size was evaluated using partial eta squared.
Results
No significant effect of condition was observed for EP (p = 0.401, ηp2 = 0.056), WEP (p = 0.580, ηp2 = 0.048), peak power (p = 0.642, ηp2 = 0.046), mean power (p = 0.212, ηp2 = 0.108), or total work (p = 0.217, ηp2 = 0.107).
Conclusions
No statistically significant differences between conditions were detected under the conditions of the present study.
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