Effects of caffeine on performance and mood depend on the level of caffeine abstinence
Yeomans MR, Ripley T, Davies LH, Rusted JM, Rogers PJ
Psychopharmacology · 74 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
- 2002-11-01 · Psychopharmacology (Berl) · vol. 164 · número 3 · págs. 241–249
- Editorial
- Springer Science+Business Media
- Citado
- 129 citas · más que el 95% de estudios similares · 4.7× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 47 trabajos
- Acceso
- Acceso abierto (copia en repositorio) · CC-BY
- Áreas de investigación
- Coffee research and impacts · Sleep and Work-Related Fatigue · Mind wandering and attention
- Palabras clave
- caffeine, caffeine withdrawal, caffeine abstinence, sustained attention, reaction time, mental alertness, mood
- MeSH
- humans, caffeine, central nervous system stimulants, placebos, drug administration schedule, double-blind method, affect, psychomotor performance, attention, reaction time, dose-response relationship, drug, time factors, coffee, adult, female, male, surveys and questionnaires
5 autores
- Martin Richard Yeomans🇬🇧 · autor de correspondenciaUniversity of Sussex
- Tamzin L. Ripley🇬🇧University of Sussex
- Laura Davies🇬🇧University of Sussex
- Jennifer M. Rusted🇬🇧University of Sussex
- Peter J. Rogers🇬🇧University of Bristol
Resumen
El texto original del estudio, en el idioma en que se publicó.
Rationale
Most studies of the effects of caffeine on performance have used regular caffeine consumers who are deprived at test. Thus the reported effects of caffeine could be explained through reversal of caffeine withdrawal.
Objectives
To test how preloading deprived caffeine consumers with 0, 1 or 2 mg/kg caffeine altered the subsequent ability of caffeine to modify mood and performance.
Methods
Thirty moderate caffeine consumers were given a drink containing 0, 1 or 2 mg/kg caffeine at breakfast followed 60 min later by a second drink containing either 0 or 1 mg/kg caffeine. Performance on a measure of sustained attention and mood were measured before and after each drink.
Results
Administration of both 1 and 2 mg/kg caffeine at breakfast decreased reaction time and 1 mg/kg caffeine also increased performance accuracy on the sustained attention (RVIP) task relative to placebo. Both breakfast doses of caffeine also improved rated mental alertness. Similarly, 1 mg/kg caffeine administered 60 min after breakfast decreased reaction time and increased rated mental alertness in the group who had not been given caffeine at breakfast. However, this second dose of caffeine had no effect on subsequent performance or mood in the two groups who had received caffeine at breakfast.
Conclusions
Caffeine reliably improved performance on a sustained attention task, and increased rated mental alertness, in moderate caffeine consumers who were tested when caffeine-deprived. However, caffeine had no such effects when consumers were no longer caffeine deprived. These data are consistent with the view that reversal of caffeine withdrawal is a major component of the effects of caffeine on mood and performance.
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