Effects of Acute Caffeine Ingestion on Morning Strength, Power and Repeated Sprint Measures in Males: A Standardized Approach
Vickery SJ, Giacomoni M, Agulhari JPS, Batten T, Crozier OG, Goorwappa D, Mauvieux B, Pullinger SA, Chester N, Hesketh SJ, Edwards BJ
Nutrients · 1 cita
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 independiente
Según la declaración de financiación del texto completo.
Publicación
- Publicado
- 2026-08-04 · Nutrients · vol. 18 · número 15 · pág. 2541
- Editorial
- Multidisciplinary Digital Publishing Institute
- Citado
- 1 cita · más que el 95% de estudios similares · 3.9× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 54 trabajos
- Acceso
- Acceso abierto (revista) · CC-BY
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Thermoregulation and physiological responses
- Palabras clave
- acute caffeine ingestion, repeated sprint performance, circadian rhythm, muscle strength, lower body power, rating of perceived exertion, caffeine withdrawal symptoms, mood, blood lactate, thermal comfort
- MeSH
- humans, lactic acid, caffeine, blood glucose, cross-over studies, double-blind method, affect, circadian rhythm, heart rate, running, adult, male, muscle strength, athletic performance, young adult
11 autores
- Sophie J. Vickery🇬🇧Liverpool John Moores University
- Magali Giacomoni🇫🇷Université de Toulon; Jeunesse - Activité Physique et Sportive, santé
- João P. S. Agulhari🇬🇧Liverpool John Moores University
- Theo Batten🇬🇧Liverpool John Moores University
- Olivia G. Crozier🇬🇧Liverpool John Moores University
- Dylan Goorwappa🇬🇧Liverpool John Moores University
- Benoît Mauvieux🇫🇷Normandie Université; Vertige Extrême; Université de Caen Normandie
- Samuel Andrew Pullinger🇬🇧Liverpool John Moores University
- Neil J. Chester🇬🇧Liverpool John Moores University
- Stuart J. Hesketh🇬🇧University of Lancashire
- Ben Edwards🇬🇧 · autor de correspondenciaLiverpool John Moores University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background/objectives
Repeated sprint performance is typically reduced during the morning because of circadian-related changes in physiological function and muscle strength. Acute caffeine supplementation may attenuate these decrements; however, evidence remains inconsistent. This is partly because of inadequate control of chronobiological and methodological confounders. This study investigated the effects of acute morning caffeine ingestion on repeated sprint performance, physiological responses, strength, power and mood under rigorously standardized chronobiological conditions.
Methods
Seventeen recreationally active, low habitual caffeine-consumer males completed six laboratory visits comprising three familiarization sessions and three experimental trials in a performance grouped, randomized for starting condition, counterbalanced, double-blind, placebo-controlled, crossover design. Participants ingested either caffeine (CAFF; 300 mg, 2.5-5.3 mg·kg-1), placebo (PLAC) or no-pill control (NoPill) 60 min before testing (07:30 h). Experimental sessions included assessments of mood, caffeine withdrawal symptoms, intra-aural temperature, grip strength, squat jump, countermovement jump and a 10 × 20 m repeated sprint protocol. Heart rate, ratings of perceived exertion (RPE), thermal comfort, blood lactate and blood glucose were assessed throughout the protocol. Data were analyzed using repeated-measures general linear models.
Results
Caffeine did not significantly improve repeated sprint performance compared with PLAC or NoPill, although a trend towards faster 20 m sprint times was observed (3.39 ± 0.19 s vs. 3.43 ± 0.18 s and 3.41 ± 0.19 s, respectively; p = 0.070). Caffeine significantly reduced RPE (p = 0.029) but did not alter heart rate, blood lactate, blood glucose, thermal comfort, intra-aural temperature, mood, sleepiness, caffeine withdrawal symptoms nor lower-body power outcomes.
Conclusions
Acute morning ingestion of 300 mg caffeine reduced perceived exertion but did not produce a clear ergogenic effect on repeated sprint performance under rigorously standardized chronobiological conditions. These findings suggest that, in low habitual caffeine users, the central perceptual effects of caffeine are insufficient to overcome the physiological constraints limiting morning repeated sprint performance and highlight the importance of rigorous chronobiological standardization when evaluating nutritional ergogenic aids.
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