The Effect of Caffeine Ingestion during Evening Exercise on Subsequent Sleep Quality in Females
Ali A, O'Donnell JM, Starck C, Rutherfurd-Markwick KJ
International journal of sports medicine · 28 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
- 2015-02-20 · Int J Sports Med · vol. 36 · número 06 · págs. 433–439
- Editorial
- Thieme Medical Publishers (Germany)
- Citado
- 35 citas · más que el 85% de estudios similares · 1.9× el promedio de su campo
- Referencias
- 36 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sleep and Work-Related Fatigue · Sleep and related disorders
- Palabras clave
- caffeine ingestion, sleep quality, evening exercise, female athletes, monophasic oral contraceptives, caffeine clearance, paraxanthine, theophylline, theobromine, sleep latency
- MeSH
- humans, caffeine, theobromine, theophylline, contraceptives, oral, exercise test, exercise, cross-over studies, double-blind method, sleep, adult, female, young adult
4 autores
- Ajmol Ali🇳🇿 · autor de correspondenciaMassey University
- J. O’Donnell🇳🇿Massey University
- Carlene S. Starck🇳🇿Massey University
- Kay Janice Rutherfurd-Markwick🇳🇿Massey University
Resumen
El texto original del estudio, en el idioma en que se publicó.
In a randomised, double-blind, placebo-controlled crossover design, 10 females taking monophasic oral contraceptives completed 90 min intermittent treadmill-running 45 min after ingestion of 6 mg∙kg(-1) body mass anhydrous caffeine or artificial sweetener (placebo). Water (3 mL∙kg(-1)) was provided every 15 min during exercise. Venous blood samples were taken before, during and after exercise, as well as after sleep (~15 h post-ingestion), and levels of caffeine, paraxanthine, theobromine and theophylline were measured using high-performance liquid chromatography. Sleep quality was assessed using the Leeds Sleep Evaluation Questionnaire. Plasma caffeine concentration peaked 100 min after ingestion. Caffeine clearance was 0.95±0.14 mL·min(-1)·kg(-1) while the elimination half-life of caffeine was 17.63±8.06 h. Paraxanthine and theophylline levels were significantly elevated at 15 h with no significant change in theobromine. Sleep latency and subsequent quality of sleep was impaired following caffeine supplementation (P<0.05); there were no differences between trials for how participants were feeling upon awakening. This is the first controlled study to examine caffeine supplementation on sleep quality in female athletes taking a low-dose monophasic oral contraceptive steroid following an intermittent-exercise running protocol. The data shows that female athletes using monophasic oral contraceptive steroids will have impaired sleep quality following evening caffeine ingestion.
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