Applied Research Group to Performance and Health, CESMAC University Center, Maceió, Brazil.
Eur J Sport Sci. 2022 Feb;22(2):227-236. doi: 10.1080/17461391.2021.1874058. Epub 2021 Feb 2.
The aim of this study was to investigate the effects of caffeine ingestion on upper-body intermittent strength endurance performance of combat sports athletes. Using a double-blind and placebo-controlled crossover design, ten experienced judo and jiu-jitsu athletes performed an upper-body intermittent strength endurance protocol (four set of judogi dynamic strength endurance test, interspersed by 3-min recovery intervals) 60 min after ingesting either caffeine (5 mg·kg) or placebo. Compared with placebo condition, caffeine ingestion significantly increased the total number of repetitions (+ 7%, = 0.04; = 0.44) and the maximal isometric handgrip strength (+ 5%, = 0.03, = 0.41). Rating of perceived exertion, heart rate and blood lactate concentration increased linearly throughout the test ( < 0.05), but without significant differences between caffeine and placebo conditions ( > 0.05). Caffeine ingestion improved the upper-body intermittent strength endurance performance and maximal isometric strength of combat sports athletes. This suggests that caffeine could help to maintain high levels of maximal handgrip and endurance strength in upper limbs, especially forearm muscles, which are responsible for maintaining the grip on the opponent's judogi. Caffeine ingestion improved upper-body intermittent strength endurance of grappling athletes.Caffeine ingestion increased maximal isometric handgrip strength of grappling athletes.Heart rate, lactate concentration or rating of perceived exertion were not affected by caffeine ingestion.Our findings suggest that caffeine could help to maintain high levels of maximal handgrip and endurance strength in upper limbs, especially forearm muscles, which are responsible for maintaining the grip on the opponent's judogi.
本研究旨在探讨咖啡因摄入对格斗运动运动员上体间歇性力量耐力表现的影响。采用双盲、安慰剂对照交叉设计，10 名有经验的柔道和柔术运动员在摄入咖啡因（5mg·kg）或安慰剂后 60 分钟，进行了上体间歇性力量耐力方案（4 组柔道动态力量耐力测试，间隔 3 分钟恢复时间）。与安慰剂相比，咖啡因摄入显著增加了总重复次数（+7%， = 0.04； = 0.44）和最大等长握力（+5%， = 0.03， = 0.41）。感觉用力等级、心率和血乳酸浓度在整个测试中呈线性增加（ < 0.05），但咖啡因和安慰剂之间没有显著差异（ > 0.05）。咖啡因摄入提高了格斗运动员的上体间歇性力量耐力和最大等长力量。这表明，咖啡因有助于维持上肢，尤其是前臂肌肉的最大握力和耐力水平，这些肌肉负责维持对对手柔道服的抓握。咖啡因摄入改善了缠斗运动员的上体间歇性力量耐力。咖啡因摄入增加了缠斗运动员的最大等长握力。心率、乳酸浓度或感觉用力等级不受咖啡因摄入的影响。我们的研究结果表明，咖啡因有助于维持上肢，尤其是前臂肌肉的最大握力和耐力水平，这些肌肉负责维持对对手柔道服的抓握。
