Napping, Caffeine, and Their Combination Enhanced Explosivity and Repeated-Sprint Performance: A Randomized Placebo-Controlled Study
Mnif M, Romdhani M, Bentouati E, Ben Yahia M, Souabni M, Driss T, Souissi N
International journal of sport nutrition and exercise metabolism · 0 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
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- Financiación no declarada
Publicación
- Publicado
- 2026-05-04 · Int J Sport Nutr Exerc Metab · vol. 36 · número 4 · págs. 408–416
- Editorial
- Human Kinetics
- Citado
- 0 citas · más que el 33% de estudios similares · 0.0× el promedio de su campo
- Referencias
- 37 trabajos
- Acceso
- De pago
- Áreas de investigación
- Sleep and Work-Related Fatigue · Coffee research and impacts · Sports Performance and Training
- Palabras clave
- napping, caffeine, explosivity, repeated sprint performance, agility, squat jump, countermovement jump, reaction time, sleepiness, Epworth Sleepiness Scale, physical education students, sleep disruption, take-off velocity, relative power, double-blind design
- MeSH
- humans, caffeine, double-blind method, reaction time, sleep, female, male, athletic performance, young adult, sleepiness
7 autores
- Mahdi Mnif🇹🇳Manouba University
- Mohamed Romdhani🇹🇳🇫🇷University of Sfax; Université Paris Nanterre; Institut Supérieur du Sport et de l’Éducation Physique de Sfax; Laboratoire interdisciplinaire en neurosciences, physiologie et psychologie
- Emna Bentouati🇹🇳Manouba University
- Mariem Ben Yahia🇹🇳University of Sfax; Institut Supérieur du Sport et de l’Éducation Physique de Sfax; Faculty of Medicine of Sfax
- Maher Souabni🇫🇷Université Paris-Saclay; Université Paris Nanterre; Laboratoire interdisciplinaire en neurosciences, physiologie et psychologie; Université d'Évry Val-d'Essonne
- Tarak Driss🇫🇷Université Paris Nanterre; Laboratoire interdisciplinaire en neurosciences, physiologie et psychologie
- Nizar Souissi🇹🇳Manouba University
Resumen
El texto original del estudio, en el idioma en que se publicó.
The study aimed to examine the independent and combined effects of a 90-min early afternoon (12:30 p.m.) nap (NAP) and an early evening (6:00 p.m.) moderate dose of caffeine (CAF; 5 mg/kg) on afternoon's variation of subjective sleepiness and reaction time and evening (7:00 p.m.) physical performance. In a randomized, counterbalanced, and double-blind design, 13 physical education students completed four conditions separated by 3-7 days: placebo (PLA), NAP, CAF, and combined nap plus caffeine (NAP + CAF). Assessments included simple and choice reaction times and the Epworth Sleepiness Scale at 12:30 p.m., before napping/resting, and every hour between 3:00 p.m. and 7:00 p.m. Jumping performance (squat jump and countermovement jump) and the repeated modified agility test were assessed once at 7:00 p.m. No significant effects of CAF, NAP, and CAF + NAP on simple reaction time, choice reaction time, and Epworth Sleepiness Scale were found. Repeated modified agility test performance improved across all interventions compared with PLA, with no difference between interventions. All interventions enhanced squat jump performance relative to PLA, with the greatest improvements observed under NAP + CAF compared with CAF (p < .05, d = 0.37, mean difference [MD] = 1.92 cm; p < .05, d = 0.38, MD = 0.07 m/s; p < .05, d = 0.01, MD = 0.01 W/kg) and NAP (p < .01, d = 0.63, MD = 2.91 cm; p < .01, d = 0.68, MD = 0.11 m/s; p < .01, d = 0.02, MD = 0.02 W/kg), respectively, for squat jump, take-off velocity, and relative power. Napping and caffeine independently enhanced repeated agility and explosivity performances, and their combination had no additional benefits on repeated agility. However, the combination further enhanced explosivity, which may benefit evening competitions in team and racket sports. Its limited effects on nonexplosive tasks and potential sleep disruption constrain broader application.
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