Effect of two doses of caffeine on muscular function during isokinetic exercise
Astorino TA, Terzi MN, Roberson DW, Burnett TR
Medicine and science in sports and exercise · 48 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
- 2010-04-27 · Med Sci Sports Exerc · vol. 42 · número 12 · págs. 2205–2210
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 70 citas · más que el 92% de estudios similares · 3.5× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 36 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Muscle metabolism and nutrition
- Palabras clave
- caffeine, ergogenic aids, isokinetic exercise, knee extensors, knee flexors, muscle torque, muscle power output, total work, high-intensity exercise, dose-response relationship
- MeSH
- muscle, skeletal, humans, caffeine, central nervous system stimulants, exercise, muscle fatigue, muscle contraction, dose-response relationship, drug, torque, adult, united states, male, resistance training, young adult
4 autores
- Todd Anthony Astorino🇺🇸California State University, San Marcos
- Michael N. Terzi🇺🇸California State University, San Marcos
- Daniel W. Roberson🇺🇸California State University, San Marcos
- Timothy R. Burnett🇺🇸San Diego State University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Unlabelled
Studies provide equivocal results regarding the ergogenic properties of caffeine during high-intensity exercise.
Purpose
The primary aim of this study was to examine the effects of two doses of caffeine on peak/average torque, power output, and total work of the knee extensors and flexors during two bouts of high-intensity exercise.
Methods
Fifteen active men (mean age = 26.4 ± 3.9 yr and body mass = 82.7 ± 2.9 kg) initially completed a familiarization bout on the isokinetic dynamometer, followed by three subsequent trials separated by at least 48 h. Exercise consisted of two bouts of 40 repetitions of maximal knee extension and flexion of the dominant leg at a contraction velocity equal to 180°·s. Before each trial, subjects abstained from caffeine intake and intense exercise for 48 h. Treatment order (5 and 2 mg·kg of anhydrous caffeine or placebo) was randomly assigned to subjects using a single-blind, randomized, counterbalanced, crossover design. A 3 (treatment) × 2 (sets) ANOVA with repeated measures was used to detect differences in performance across treatment and time.
Results
Compared with placebo, caffeine significantly (P < 0.05) enhanced peak knee flexion torque, knee extension/flexion total work, and knee extension/flexion power in bout 1 with no effect in bout 2. Only the 5-mg·kg dose of caffeine improved performance, with the magnitude of performance improvement ranging from 5% to 8%.
Conclusions
Data suggest that a relatively high (5-mg·kg body weight) but not low (2-mg·kg body weight) caffeine dose is ergogenic for maximal knee extension/flexion exercise.
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