Effect of caffeine ingestion on muscular strength and endurance: a meta-analysis
Warren GL, Park ND, Maresca RD, McKibans KI, Millard-Stafford ML
Medicine and science in sports and exercise · 197 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
- Metaanálisis (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación no declarada
Publicación
- Publicado
- 2010-03-18 · Med Sci Sports Exerc · vol. 42 · número 7 · págs. 1375–1387
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 295 citas · más que el 97% de estudios similares · 6.6× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 62 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Muscle metabolism and nutrition
- Palabras clave
- caffeine, muscle strength, muscular endurance, maximal voluntary contraction, knee extensors, muscle activation, central nervous system, ergogenic aids
- MeSH
- lower extremity, upper extremity, muscle, skeletal, humans, caffeine, central nervous system stimulants, physical endurance, muscle strength
5 autores
- Gordon L. Warren🇺🇸Georgia State University
- NICOLE D. PARK🇺🇸Georgia State University
- ROBERT D. MARESCA🇺🇸Georgia State University
- KIMBERLY I. MCKIBANS🇺🇸Georgia State University
- MELINDA L. MILLARD-STAFFORD🇺🇸Georgia Institute of Technology
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
Our objective was to perform a systematic review and meta-analysis of the research literature assessing the effect of caffeine ingestion on maximal voluntary contraction (MVC) strength and muscular endurance.
Methods
Thirty-four relevant studies between 1939 and 2008 were included in the meta-analyses of caffeine's effects on MVC strength (n = 27 studies) and muscular endurance (n = 23 studies). Effect sizes (ES) were calculated as the standardized mean difference and meta-analyses were completed using a random-effects model.
Results
Overall, caffeine ingestion was found to result in a small beneficial effect on MVC strength (overall ES = 0.19, P = 0.0003). However, caffeine appears to improve MVC strength primarily in the knee extensors (i.e., by approximately 7%, ES = 0.37) and not in other muscle groups such as the forearm or the knee flexors. In an attempt to offer a physiological mechanism behind caffeine's ability to improve MVC strength, a meta-analysis was run on ES from nine studies that measured percent muscle activation during MVC in trials comparing caffeine versus placebo; the overall ES (0.67) was highly significant (P = 0.00008) and of moderate to large size, thus implicating an effect of caffeine on the CNS. Caffeine ingestion was also found to exert a small beneficial effect on muscular endurance (overall ES = 0.28, P = 0.00005). However, it appears caffeine improves muscular endurance only when it is assessed using open (i.e., by approximately 18%, ES = 0.37) and not fixed end point tests.
Conclusions
Overall, caffeine ingestion improves MVC strength and muscular endurance. The effect on strength appears exclusively in the knee extensors, and the effect on muscular endurance appears only detectable with open end point tests.
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