Financiado en parte por LifeScan
Improved cycling time-trial performance after ingestion of a caffeine energy drink
Ivy JL, Kammer L, Ding Z, Wang B, Bernard JR, Liao YH, Hwang J
International journal of sport nutrition and exercise metabolism · 71 citas
Etiquetas de revisión
Financiado por la industriaDatos 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
- Financiado por la industria
- Empresa
- LifeScan
Según 1 financiador declarado.
Publicación
- Publicado
- 2009-02-01 · Int J Sport Nutr Exerc Metab · vol. 19 · número 1 · págs. 61–78
- Editorial
- Human Kinetics
- Citado
- 163 citas · más que el 98% de estudios similares · 8.8× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 47 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Muscle metabolism and nutrition
- Palabras clave
- energy drinks, caffeine, cycling time trial, endurance performance, beta-endorphin, perceived exertion, substrate utilization, taurine, trained cyclists
- MeSH
- humans, lactates, caffeine, blood glucose, basal metabolism, area under curve, cross-over studies, double-blind method, task performance and analysis, oxygen consumption, physical endurance, bicycling, beverages, adult, female, male
7 autores
- John L. Ivy🇺🇸The University of Texas at Austin
- Lynne Kammer
- Zhenping Ding
- Bei Wang
- Jeffrey R. Bernard
- Yi‐Hung Liao
- Jungyun Hwang
Resumen
El texto original del estudio, en el idioma en que se publicó.
Context
Not all athletic competitions lend themselves to supplementation during the actual event, underscoring the importance of preexercise supplementation to extend endurance and improve exercise performance. Energy drinks are composed of ingredients that have been found to increase endurance and improve physical performance.
Purpose
The purpose of the study was to investigate the effects of a commercially available energy drink, ingested before exercise, on endurance performance.
Methods
The study was a double-blind, randomized, crossover design. After a 12-hr fast, 6 male and 6 female trained cyclists (mean age 27.3 +/- 1.7 yr, mass 68.9 +/- 3.2 kg, and VO2 54.9 +/- 2.3 ml x kg-1 x min-1) consumed 500 ml of either flavored placebo or Red Bull Energy Drink (ED; 2.0 g taurine, 1.2 g glucuronolactone, 160 mg caffeine, 54 g carbohydrate, 40 mg niacin, 10 mg pantothenic acid, 10 mg vitamin B6, and 10 microg vitamin B12) 40 min before a simulated cycling time trial. Performance was measured as time to complete a standardized amount of work equal to 1 hr of cycling at 70% Wmax.
Results
Performance improved with ED compared with placebo (3,690 +/- 64 s vs. 3,874 +/- 93 s, p < .01), but there was no difference in rating of perceived exertion between treatments. b-Endorphin levels increased during exercise, with the increase for ED approaching significance over placebo (p = .10). Substrate utilization, as measured by open-circuit spirometry, did not differ between treatments.
Conclusion
These results demonstrate that consuming a commercially available ED before exercise can improve endurance performance and that this improvement might be in part the result of increased effort without a concomitant increase in perceived exertion.
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