Pérez-López Alberto, Garriga-Alonso Laura, Montalvo-Alonso Juan Jesús, Val-Manzano Marta Del, Valades David, Vila Helena, Ferragut Carmen
Universidad de Alcalá, Facultad de Medicina y Ciencias de la Salud, Departamento de Ciencias Biomédicas, Madrid, España.
Department of Special Didactics, Faculty of Education and Sport Sciences, University of Vigo, Pontevedra, Spain.
Eur J Sport Sci. 2025 Jan;25(1):e12233. doi: 10.1002/ejsc.12233. Epub 2024 Dec 11.
This study aimed to examine sex differences in acute caffeine intake on repeated sprint performance. Fifty-two resistance-trained individuals (age: 24.6 ± 4.5 years and sex (female/male): 26/26) participated in a randomized, triple-blind, cross-over, and placebo-controlled study. Participants ingested 3 mg/kg caffeine or placebo and, after 60 min, performed 4 Wingate tests (Wt), consisting of a 30 s all-out lower-body sprint against an individualized resisted load, with 90 s rest periods between sprints. Mean (W) and peak (W) power showed an interaction between sprint and supplement (P = 0.038, η = 0.095 and P < 0.001, η = 0.157, respectively), but only W reported a supplement and sex interaction (P = 0.049 and η = 0.166). Caffeine increased W in Wt3 (3.5%, P = 0.004, and g = 1.059) and Wt4 (3.9%, P = 0.012, and g = 1.091) compared to placebo. Whereas, for W, caffeine increased W in the Wt1 (2.9%, P = 0.050 and g = 1.01) and Wt2 (3.2%, P = 0.050, and g = 1.01) in males and in Wt3 (5.2%, P = 0.008, and g = 1.79) and Wt4 (8.1%, P = 0.004, and g = 2.27) in female participants compared to placebo. No statistically significant sex differences were found in time to reach W, fatigue index. Acute caffeine intake stimulated a similar ergogenic effect on repeated sprint performance in men and women, except in peak power output, where caffeine increased performance during the first sprints in males and the last sprints in female participants.
本研究旨在探讨急性摄入咖啡因对重复冲刺能力的性别差异。52名进行抗阻训练的个体（年龄：24.6±4.5岁，性别（女性/男性）：26/26）参与了一项随机、三盲、交叉、安慰剂对照研究。参与者摄入3mg/kg咖啡因或安慰剂，60分钟后进行4次温盖特测试（Wt），包括以个体化阻力负荷进行30秒全力下肢冲刺，每次冲刺之间休息90秒。平均功率（W）和峰值功率（W）显示冲刺和补充剂之间存在交互作用（P = 0.038，η = 0.095和P < 0.001，η = 0.157），但只有W报告了补充剂和性别交互作用（P = 0.049，η = 0.166）。与安慰剂相比，咖啡因使Wt3中的W增加（3.5%，P = 0.004，g = 1.059）和Wt4中的W增加（3.9%，P = 0.012，g = 1.091）。而对于W，与安慰剂相比，咖啡因使男性Wt1中的W增加（2.9%，P = 0.050，g = 1.01）和Wt2中的W增加（3.2%，P = 0.050，g = 1.01），女性参与者Wt3中的W增加（5.2%，P = 0.008，g = 1.79）和Wt4中的W增加（8.1%，P = 0.004，g = 2.27）。在达到W的时间、疲劳指数方面未发现统计学上显著的性别差异。急性摄入咖啡因对男性和女性的重复冲刺能力产生了类似的促力效应，但在峰值功率输出方面除外，在该方面咖啡因增加了男性第一次冲刺和女性参与者最后一次冲刺时的表现。
