The acute physiological and mood effects of tea and coffee: the role of caffeine level
Quinlan PT, Lane J, Moore KL, Aspen J, Rycroft JA, O'Brien DC
Pharmacology, biochemistry, and behavior · 87 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
- 2000-05-01 · Pharmacol Biochem Behav · vol. 66 · número 1 · págs. 19–28
- Editorial
- Elsevier BV
- Citado
- 181 citas · más que el 98% de estudios similares · 7.8× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 34 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sleep and Work-Related Fatigue · Tea Polyphenols and Effects
- Palabras clave
- caffeine, tea, coffee, acute physiological responses, mood, autonomic nervous system, blood pressure, heart rate, skin conductance, skin temperature, energetic arousal, alertness, caffeine dose-response
- MeSH
- autonomic nervous system, saliva, skin, humans, caffeine, cross-over studies, affect, skin temperature, blood pressure, heart rate, dose-response relationship, drug, coffee, tea, adult, middle aged, female, male
6 autores
- Paul T. Quinlan🇬🇧 · autor de correspondenciaUnilever (United Kingdom)
- Joan Lane🇬🇧Unilever (United Kingdom)
- Karen L. Moore🇬🇧Unilever (United Kingdom)
- Jennifer M. Aspen🇬🇧Unilever (United Kingdom)
- Jane A. Rycroft🇬🇧Unilever (United Kingdom)
- D. O'Brien🇬🇧Unilever (United Kingdom)
Resumen
El texto original del estudio, en el idioma en que se publicó.
The objective of this study was to determine the effect of caffeine level in tea and coffee on acute physiological responses and mood. Randomised full crossover design in subjects after overnight caffeine abstention was studied. In study 1 (n = 17) the caffeine level was manipulated naturalistically by preparing tea and coffee at different strengths (1 or 2 cups equivalent). Caffeine levels were 37.5 and 75 mg in tea, 75 and 150 mg in coffee, with water and no-drink controls. In study 2 (n = 15) caffeine level alone was manipulated (water, decaffeinated tea, plus 0, 25, 50, 100, and 200 mg caffeine). Beverage volume and temperature (55 degrees C) were constant. SBP, DBP, heart rate, skin temperature, skin conductance, and mood were monitored over each 3-h study session. In study 1, tea and coffee produced mild autonomic stimulation and an elevation in mood. There were no effects of tea vs. coffee or caffeine dose, despite a fourfold variation in the latter. Increasing beverage strength was associated with greater increases in DBP and energetic arousal. In study 2, caffeinated beverages increased SBP, DBP, and skin conductance and lowered heart rate and skin temperature compared to water. Significant dose-response relationships to caffeine were seen only for SBP, heart rate, and skin temperature. There were significant effects of caffeine on energetic arousal but no consistent dose-response effects. Caffeinated beverages acutely stimulate the autonomic nervous system and increase alertness. Although caffeine can exert dose-dependent effects on a number of acute autonomic responses, caffeine level is not an important factor. Factors besides caffeine may contribute to these acute effects.
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