Neuromuscular responses to incremental caffeine doses: performance and side effects
Pallarés JG, Fernández-Elías VE, Ortega JF, Muñoz G, Muñoz-Guerra J, Mora-Rodríguez R
Medicine and science in sports and exercise · 140 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
- 2013-05-11 · Med Sci Sports Exerc · vol. 45 · número 11 · págs. 2184–2192
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 180 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
- 41 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Muscle metabolism and nutrition
- Palabras clave
- caffeine, ergogenic aids, muscle strength, muscle power, neuromuscular performance, dose-response relationship, resistance training, squatting, bench press, cycling power output, propulsive velocity, caffeine side effects, resistance-trained men
- MeSH
- muscle, skeletal, urine, humans, gastrointestinal diseases, headache, tachycardia, caffeine, central nervous system stimulants, cross-over studies, double-blind method, weight lifting, adult, male, muscle strength, athletic performance, young adult, myalgia
6 autores
- Jesús G. Pallarés🇪🇸University of Castilla-La Mancha
- Valentín E. Fernández-Elías🇪🇸University of Castilla-La Mancha
- JUAN FERNANDO ORTEGA🇪🇸University of Castilla-La Mancha
- Glòria Muñoz
- Jesús Muñoz‐Guerra
- Ricardo Mora‐Rodríguez🇪🇸University of Castilla-La Mancha
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
The purpose of this study was to determine the oral dose of caffeine needed to increase muscle force and power output during all-out single multijoint movements.
Methods
Thirteen resistance-trained men underwent a battery of muscle strength and power tests in a randomized, double-blind, crossover design, under four different conditions: (a) placebo ingestion (PLAC) or with caffeine ingestion at doses of (b) 3 mg · kg(-1) body weight (CAFF 3mg), (c) 6 mg · kg(-1) (CAFF 6mg), and (d) 9 mg · kg(-1) (CAFF 9mg). The muscle strength and power tests consisted in the measurement of bar displacement velocity and muscle power output during free-weight full-squat (SQ) and bench press (BP) exercises against four incremental loads (25%, 50%, 75%, and 90% one-repetition maximum [1RM]). Cycling peak power output was measured using a 4-s inertial load test. Caffeine side effects were evaluated at the end of each trial and 24 h later.
Results
Mean propulsive velocity at light loads (25%-50% 1RM) increased significantly above PLAC for all caffeine doses (5.4%-8.5%, P = 0.039-0.003). At the medium load (75% 1RM), CAFF 3mg did not improve SQ or BP muscle power or BP velocity. CAFF 9mg was needed to enhance BP velocity and SQ power at the heaviest load (90% 1RM) and cycling peak power output (6.8%-11.7%, P = 0.03-0.05). The CAFF 9mg trial drastically increased the frequency of the adverse side effects (15%-62%).
Conclusions
The ergogenic dose of caffeine required to enhance neuromuscular performance during a single all-out contraction depends on the magnitude of load used. A dose of 3 mg · kg(-1) is enough to improve high-velocity muscle actions against low loads, whereas a higher caffeine dose (9 mg · kg(-1)) is necessary against high loads, despite the appearance of adverse side effects.
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