Ergogenic effects of low doses of caffeine on cycling performance
Jenkins NT, Trilk JL, Singhal A, O'Connor PJ, Cureton KJ
International journal of sport nutrition and exercise metabolism · 90 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
- 2008-06-01 · Int J Sport Nutr Exerc Metab · vol. 18 · número 3 · págs. 328–342
- Editorial
- Human Kinetics
- Citado
- 155 citas · más que el 95% de estudios similares · 4.6× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 32 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Muscle metabolism and nutrition
- Palabras clave
- caffeine, ergogenic aids, cycling performance, low-dose caffeine, perceived exertion, blood lactate, interindividual variability, endurance exercise
- MeSH
- muscle, skeletal, nociceptors, humans, pain, fatigue, lactates, caffeine, central nervous system stimulants, exercise test, pain measurement, treatment outcome, cross-over studies, perception, pain threshold, oxygen consumption, dose-response relationship, drug, time factors, bicycling, adult, male, physical exertion
5 autores
- Nathan T. Jenkins🇺🇸University of Georgia
- Jennifer L. Trilk
- Arpit Singhal
- Patrick J. O’Connor
- Kirk J. Cureton
Resumen
El texto original del estudio, en el idioma en que se publicó.
The purpose of this experiment was to learn whether low doses of caffeine have ergogenic, perceptual, and metabolic effects during cycling. To determine the effects of 1, 2, and 3 mg/kg caffeine on cycling performance, differentiated ratings of perceived exertion (D-RPE), quadriceps pain intensity, and metabolic responses to cycling exercise, 13 cyclists exercised on a stationary ergometer for 15 min at 80% VO, then, after 4 min of active recovery, completed a 15-min VO2peak performance ride 60 min after ingesting caffeine or placebo. Work done (kJ/kg) during the performance ride was used as a measure of performance. D-RPE, pain ratings, and expired-gas data were obtained every 3 min, and blood lactate concentrations were obtained at 15 and 30 min. Compared with placebo, caffeine doses of 2 and 3 mg/kg increased performance by 4% (95% CI: 1.0-6.8%, p = .02) and 3% (95% CI: -0.4% to 6.8%, p = .077), respectively. These effects were ergogenic, on average, but varied considerably in magnitude among individual cyclists. There were no effects of caffeine on D-RPE or pain throughout the cycling task. Selected metabolic variables were affected by caffeine, consistent with its known actions. The authors conclude that caffeine preparations of 2 and 3 mg/kg enhanced performance, but future work should aim to explain the considerable interindividual variability of the drug's ergogenic properties.
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