Caffeine, performance, and metabolism during repeated Wingate exercise tests
Greer F, McLean C, Graham TE
Journal of applied physiology (Bethesda, Md. : 1985) · 109 citas
Etiquetas de revisión
Financiación no declaradaDatos neutrales que nuestra revisión registró sobre cómo se hizo este estudio. Describen el método, nunca si nos gusta el resultado.
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 no declarada
Publicación
- Publicado
- 1998-10-01 · J Appl Physiol (1985) · vol. 85 · número 4 · págs. 1502–1508
- Editorial
- American Physiological Society
- Citado
- 240 citas · más que el 84% de estudios similares · 1.7× el promedio de su campo
- Referencias
- 35 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Muscle metabolism and nutrition
- Palabras clave
- caffeine, ergogenic aids, high-intensity exercise, repeated exercise bouts, output power, plasma epinephrine, blood lactate, oxygen consumption, anaerobic metabolism, blood ammonia
- MeSH
- humans, potassium, ammonia, epinephrine, norepinephrine, glycerol, lactates, caffeine, blood glucose, exercise test, double-blind method, oxygen consumption, physical endurance, bicycling, adult, male, physical exertion
3 autores
- Felicia A. Greer🇨🇦University of Guelph
- C. McLean🇨🇦University of Guelph
- Terry E. Graham🇨🇦University of Guelph
Resumen
El texto original del estudio, en el idioma en que se publicó.
Investigations examining the ergogenic and metabolic influence of caffeine during short-term high-intensity exercise are few in number and have produced inconsistent results. This study examined the effects of caffeine on repeated bouts of high-intensity exercise in recreationally active men. Subjects (n = 9) completed four 30-s Wingate (WG) sprints with 4 min of rest between each exercise bout on two separate occasions. One hour before exercise, either placebo (P1; dextrose) or caffeine (Caf; 6 mg/kg) capsules were ingested. Caf ingestion did not have any effect on power output (peak or average) in the first two WG tests and had a negative effect in the latter two exercise bouts. Plasma epinephrine concentration was significantly increased 60 min after Caf ingestion compared with P1; however, this treatment effect disappeared once exercise began. Caf ingestion had no significant effect on blood lactate, O2 consumption, or aerobic contribution at any time during the protocol. After the second Wingate test, plasma NH3 concentration increased significantly from the previous WG test and was significantly higher in the Caf trial compared with P1. These data demonstrate no ergogenic effect of caffeine on power output during repeated bouts of short-term, intense exercise. Furthermore, there was no indication of increased anaerobic metabolism after Caf ingestion with the exception of an increase in NH3 concentration.
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