Caffeine lowers perceptual response and increases power output during high-intensity cycling
Doherty M, Smith P, Hughes M, Davison R
Journal of sports sciences · 88 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
- Johns Hopkins University
Según 1 financiador declarado.
Publicación
- Publicado
- 2004-07-01 · J Sports Sci · vol. 22 · número 7 · págs. 637–643
- Editorial
- Taylor & Francis
- Citado
- 158 citas · más que el 91% de estudios similares · 3.3× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 45 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Muscle metabolism and nutrition
- Palabras clave
- caffeine, high-intensity cycling, rating of perceived exertion, output power, blood lactate, endurance performance
- MeSH
- humans, fatigue, lactates, caffeine, placebos, exercise test, perception, psychomotor performance, oxygen consumption, physical endurance, time factors, bicycling, adult, male, physical exertion
4 autores
- Mike Doherty
- Paul M. Smith
- Michael G. Hughes🇸🇬🇬🇧University of Wales Institute Cardiff; Cardiff Metropolitan University
- Richard R. Davison🇬🇧Sheffield Hallam University
Resumen
El texto original del estudio, en el idioma en que se publicó.
The aim of this study was to determine the effects of caffeine ingestion on a 'preloaded' protocol that involved cycling for 2 min at a constant rate of 100% maximal power output immediately followed by a 1-min 'all-out' effort. Eleven male cyclists completed a ramp test to measure maximal power output. On two other occasions, the participants ingested caffeine (5 mg. kg(-1)) or placebo in a randomized, double-blind procedure. All tests were conducted on the participants' own bicycles using a Kingcycle test rig. Ratings of perceived exertion (RPE; 6-20 Borg scale) were lower in the caffeine trial by approximately 1 RPE point at 30, 60 and 120 s during the constant rate phase of the preloaded test (P <0.05). The mean power output during the all-out effort was increased following caffeine ingestion compared with placebo (794+/-164 vs 750+/-163 W; P=0.05). Blood lactate concentration 4, 5 and 6 min after exercise was also significantly higher by approximately 1 mmol. l(-1) in the caffeine trial (P <0.05). These results suggest that high-intensity cycling performance can be increased following moderate caffeine ingestion and that this improvement may be related to a reduction in RPE and an elevation in blood lactate concentration.
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