Increases in cycling performance in response to caffeine ingestion are repeatable
Astorino TA, Cottrell T, Lozano AT, Aburto-Pratt K, Duhon J
Nutrition research (New York, N.Y.) · 30 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
- 2012-02-01 · Nutr Res · vol. 32 · número 2 · págs. 78–84
- Editorial
- Elsevier BV
- Citado
- 47 citas · más que el 90% de estudios similares · 2.9× el promedio de su campo
- Referencias
- 38 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Thermoregulation and physiological responses
- Palabras clave
- caffeine, ergogenic aids, cycling performance, time trial, repeatability, endurance cyclists, heart rate, rating of perceived exertion, placebo, interindividual variability
- MeSH
- humans, caffeine, central nervous system stimulants, plant extracts, analysis of variance, cross-over studies, reproducibility of results, single-blind method, perception, heart rate, bicycling, beverages, adult, female, male, athletic performance, physical exertion, young adult, performance-enhancing substances
5 autores
- Todd Anthony Astorino🇺🇸 · autor de correspondenciaCalifornia State University, San Marcos
- Trisha Cottrell🇺🇸California State University, San Marcos
- Andrea Talhami Lozano🇺🇸Tufts University; California State University, San Marcos
- Kylan Aburto-Pratt🇺🇸California State University, San Marcos
- Jessica Duhon🇺🇸California State University, San Marcos; San Diego State University
Resumen
El texto original del estudio, en el idioma en que se publicó.
The primary aim of this study was to determine the repeatability of caffeine's ergogenic effects on cycling performance. It was hypothesized that improvements in performance would be similar when caffeine was ingested on 2 separate days. Nine endurance-trained men and women (mean age and maximal oxygen uptake, 27.4 ± 5.9 years and 57.5 ± 3.9 mL kg⁻¹ min⁻¹) initially completed 2 familiarization trials. During 3 subsequent sessions separated by at least 48 hours, the subjects completed a 10-km cycling time trial preceded by ingestion of a drink containing caffeine (5 mg/kg) or placebo. Treatments were ingested using a randomized, single-blind, crossover design, and the subjects were deceived as to the specific content of all drinks. During exercise, heart rate, rating of perceived exertion, and time were recorded every 1.6 km. Repeated-measures analysis of variance was used to compare the differences in variables across distance and treatment. In both caffeine trials, caffeine increased (P = .02) cycling performance by 1.6% and 1.9% vs placebo (16.98 ± 0.96 and 16.92 ± 0.97 minutes with caffeine vs 17.25 ± 0.96 minutes in placebo), and 7 of 9 subjects revealed improved performance. The mean performance improvement in the caffeine trials was similar (P = .35; -0.27 and -0.32 minutes, respectively) across days. Heart rate during exercise was higher (P b .001) with caffeine vs placebo, although the rating of perceived exertion was similar (P = .65). Data reveal that caffeine's ergogenic effects on cycling performance are repeatable across days, yet some individuals did not exhibit improved performance with caffeine.
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