Nana Alisa, Ramyarangsi Papatsorn, Jamwai Luksika, Hiranphan Poomwut, Siripornpanich Vorasith, Ajjimaporn Amornpan
Mahidol University, College of Sports Science and Technology, Nakhonpathom, Thailand.
Mahidol University, Research Center for Neuroscience, Institute of Molecular Biosciences, Nakhonpathom, Thailand.
J Int Soc Sports Nutr. 2025 Dec;22(1):2526094. doi: 10.1080/15502783.2025.2526094. Epub 2025 Jun 28.
Caffeine is commonly used to combat fatigue and enhance both cognitive and physical performance. However, its effects on neurophysiological responses and sport-specific performance following fatigue induction remain unclear, particularly in combat sports such as Taekwondo. This study investigated the effects of a 200 mg caffeine dose on physiological markers, electroencephalographic (EEG) brainwave activity, auditory P300 event-related potentials (ERPs), and Taekwondo-specific performance following combined mental and physical fatigue.
Thirteen male Taekwondo athletes participated in a randomized, double-blind, crossover study with caffeine (CAF) and placebo (PLA) conditions. Measurements were taken at baseline (pre-supplementation), 30 minutes post-supplementation (post-Sup), and after fatigue induction (post-I). Physiological parameters (heart rate, blood glucose, blood lactate, and ratings of perceived exertion), EEG brainwave activity during resting eyes-open conditions, auditory P300 ERPs, and Taekwondo-specific agility (TSAT) were assessed at all time points.
Caffeine significantly reduced delta wave power at frontal and parieto-occipital sites at post-Sup ( < 0.05), indicating decreased cortical drowsiness; however, this effect was not sustained at post-I ( > 0.05). P300 amplitude significantly increased in the CAF condition compared to PLA from post-Sup to post-I at the central and parietal electrode sites ( < 0.05), while P300 latency remained unchanged ( > 0.05). No significant differences were observed in reaction time, accuracy, or error rate in the auditory oddball task or TSAT performance across conditions ( > 0.05). Similarly, physiological parameters remained unchanged between groups ( > 0.05).
A single 200 mg dose of caffeine reduced central fatigue and enhanced cognitive processing, as reflected by suppressed delta wave activity at post-Sup and increased P300 amplitude at post-I. However, caffeine did not influence physiological responses or Taekwondo-specific performance. These findings suggest that low-dose caffeine primarily benefits cognitive function rather than physical performance in combat sports. Future studies should explore dose-response relationships and individual variability in caffeine metabolism to optimize its application in competitive settings.
咖啡因常用于对抗疲劳并提高认知和身体表现。然而，其在疲劳诱导后对神经生理反应和特定运动表现的影响仍不明确，尤其是在跆拳道等格斗运动中。本研究调查了200毫克咖啡因剂量对生理指标、脑电图（EEG）脑电波活动、听觉P300事件相关电位（ERP）以及身心疲劳后跆拳道特定表现的影响。
13名男性跆拳道运动员参与了一项咖啡因（CAF）和安慰剂（PLA）条件下的随机、双盲、交叉研究。在基线（补充前）、补充后30分钟（补充后）和疲劳诱导后（诱导后）进行测量。在所有时间点评估生理参数（心率、血糖、血乳酸和主观用力程度评级）、静息睁眼条件下的EEG脑电波活动、听觉P300 ERP以及跆拳道特定敏捷性（TSAT）。
咖啡因在补充后显著降低了额叶和顶枕叶部位的δ波功率（<0.05），表明皮层嗜睡减少；然而，这种效果在诱导后并未持续（>0.05）。与PLA相比，在中央和顶叶电极部位，从补充后到诱导后，CAF条件下P300波幅显著增加（<0.05），而P300潜伏期保持不变（>0.05）。在听觉oddball任务的反应时间、准确性或错误率或不同条件下的TSAT表现方面未观察到显著差异（>0.05）。同样，两组之间的生理参数保持不变（>0.05）。
单次200毫克咖啡因剂量可减轻中枢疲劳并增强认知加工，补充后δ波活动受抑制以及诱导后P300波幅增加反映了这一点。然而，咖啡因并未影响生理反应或跆拳道特定表现。这些发现表明，低剂量咖啡因在格斗运动中主要有益于认知功能而非身体表现。未来的研究应探索剂量反应关系以及咖啡因代谢的个体差异，以优化其在竞技环境中的应用。
Zotero 插件
