Effect of caffeine on reactive agility time when fresh and fatigued
Duvnjak-Zaknich DM, Dawson BT, Wallman KE, Henry G
Medicine and science in sports and exercise · 34 citas
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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
- 2011-01-25 · Med Sci Sports Exerc · vol. 43 · número 8 · págs. 1523–1530
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 49 citas · más que el 91% de estudios similares · 3.1× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 46 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Sport Psychology and Performance
- Palabras clave
- caffeine, reactive agility, decision accuracy, acute caffeine ingestion, exercise fatigue, team sport athletes, intermittent operation, decision time, movement time
- MeSH
- humans, fatigue, caffeine, central nervous system stimulants, double-blind method, decision making, reaction time, adolescent, adult, male, athletic performance, young adult, athletes
4 autores
- Daniel M. Duvnjak‐Zaknich🇦🇺The University of Western Australia
- BRIAN T. DAWSON🇦🇺The University of Western Australia
- Karen Elizabeth Wallman🇦🇺The University of Western Australia
- Greg J. Henry🇦🇺The University of Western Australia
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
This study examined the effects of acute caffeine ingestion on agility performance and decision-making accuracy after simulated team-sport exercise.
Methods
Using a randomized, double-blinded, counterbalanced design, 10 moderately trained male team-sport athletes ingested either caffeine (6 mg·kg(-1)) or placebo (dextrose) 60 min before completing an 80-min (4 × 20 min) simulated team-game, intermittent running protocol. Interspersed between each exercise quarter was a reactive agility test (RAT) consisting of five trials where measures of total time (TT), reactive agility (RA) time, decision time (DT), movement time (MT), and decision-making accuracy were obtained.
Results
Although there were no significant differences between trials for TT (P = 0.54), RA time (P = 0.84), MT (P = 0.89), or DT (P = 0.91), caffeine ingestion resulted in consistently faster TT (2.3%), RA time (3.9%), MT (2.7%), and DT (9.3%) scores compared with placebo (significant main effect for condition for RA time, TT, DT, and MT; P < 0.05). These faster times were supported by qualitative analyses of "almost certain benefit" and large effect size (ES) for RA (quarter 3) and "likely" to "very likely benefits" and moderate to large ES for TT (precircuit and quarters 1, 2, and 4) and RA time (precircuit and quarters 1, 2 and 4). A "likely benefit" and moderate ES was found for MT (quarters 1 and 3), but the effect of caffeine on DT was largely "unclear," with small ES and only a "likely" chance of benefit (quarters 2 and 3). Improved decision-making accuracy (3.8%) after caffeine ingestion was supported by a "likely benefit" (quarter 1) and large ES (quarters 1 and 4).
Conclusion
Caffeine ingestion may be beneficial to RA performance when athletes are fresh and fatigued.
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