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Effect of Acute Caffeine Intake on Maximal Aerobic Speed in University Soccer Players Assessed by the 30-15 Intermittent Fitness Test.

García-Chaves DC, Fernandez Zapata JP, Oyaga Álvarez T, Ortiz Escobar N, Villegas Mazo A, Corredor-Serrano LF.

Resumen ejecutivo en español

📌 TL;DR: Caffeine mejora la velocidad máxima de ejercicio intermitente en futbolistas universitarios.

🔬 Puntos clave:

🎯 Aplicación clínica para LATAM:
Este estudio sugiere que el café podría ser útil como estrategia para mejorar el rendimiento aeróbico intermitente en futbolistas universitarios. En un contexto latinoamericano, esto podría tener aplicaciones en la preparación de equipos deportivos y en el desarrollo de programas de entrenamiento.

⚠ Limitaciones:
El estudio se realizó con jugadores universitarios varones, lo que limita su generalización a otros grupos poblacionales o contextos.

Abstract original

The aim of this study was to analyze the effect of acute caffeine intake on maximal aerobic speed (MAS) assessed using the 30-15 Intermittent Fitness Test (IFT) in university soccer players. An experimental, randomized, double-blind, crossover design was employed, involving 26 male university team players (n = 26). Each participant completed the test under two conditions: caffeine supplementation (220 mg; 2.85 ± 0.27 mg/kg, range 2.60-3.16 mg/kg) and placebo, separated by a 72 h washout period. The final running speed achieved (VIFT) was used as an estimator of MAS. Statistical analysis included descriptive statistics, normality testing, and paired Student's t-test, with a significance level set at p < 0.05. The results revealed a significant improvement in VIFT under the caffeine condition (19.94 ± 1.67 km/h) compared with placebo (18.72 ± 1.50 km/h), with a mean difference of 1.22 km/h (6.5%) and a large effect size (dz = 1.24; p < 0.001). It is concluded that acute caffeine intake was associated with a significant improvement in intermittent aerobic performance in university soccer players under the conditions of the present study, suggesting that caffeine may represent a potentially useful strategy in similar applied contexts.

Cómo citar:
García-Chaves DC, Fernandez Zapata JP, Oyaga Álvarez T, Ortiz Escobar N, Villegas Mazo A, Corredor-Serrano LF. (2026). Effect of Acute Caffeine Intake on Maximal Aerobic Speed in University Soccer Players Assessed by the 30-15 Intermittent Fitness Test.. Sports (Basel, Switzerland).
DOI: 10.3390/sports14030123 ↗
PMID: 41893614 ↗
Acceso al paper: Ver completo ↗

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