The aim of this study was to examine the influence of caffeine supplementation (4.5 mg⋅kg−1) on lower body resistance training (RT) performance preceded with and without an acute bout of endurance exercise. In a double-blinded crossover study, 10 moderately active males (20.6±2.1 yo) carried out six exercise sessions (2 x 1RM sessions; 2 x resistance sessions; 2 concurrent sessions). Resistance exercise sessions (CAF+RES and PLA+RES) were carried out with 4 maximum sets of leg press, leg extension and leg curl to volitional fatigue at 65% of 1RM for each exercise with 1 min inter-set and inter-session rest interval. Sessions consisted on 4 maximum sets to volitional fatigue at 65% of 1RM for each exercise with 1 min of rest interval between sets and exercises. Concurrent training sessions (CAF+CON and PLA+CON) were identical but were preceded by 30 min of continuous treadmill running at 75-85% HRmax. Physical performance showed a significant main effect for treatment (p < 0.0001), protocol (p < 0.02), exercises (p < 0.0001) and sets (p < 0.0001). Physical performance during RES was reduced after endurance exercise, indicating a cumulative effect of CON. Caffeine supplementation blunted this cumulative effect. We conclude that caffeine supplementation could be used to improve the RT performance when it is done immediately after an aerobic training.

中文翻译：

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同时训练和补充咖啡因对抵抗力训练的作用-简短的研究报告

这项研究的目的是要检查咖啡因补充（4.5 mg·kg·1）对有或没有急性耐力运动之前的下肢抵抗训练（RT）性能的影响。在一个双盲交叉研究中，10个中等活跃的男性（20.6±2.1 yo）进行了六个运动会议（2 x 1RM会议； 2 x阻力会议； 2并发会议）。进行阻力锻炼（CAF + RES和PLA + RES），每次锻炼1组，休息1分钟，进行4组最大的腿部按压，腿部伸展和腿部弯曲，直到1RM的65％达到疲劳疲劳间隔。每次训练包括4组最大疲劳疲劳训练，每次运动1RM的65％，每组和运动之间的休息间隔为1分钟。并发训练（CAF + CON和PLA + CON）相同，但在连续跑步机上以30％HRmax运行30分钟之前。身体表现显示出对治疗（p <0.0001），治疗方案（p <0.02），运动（p <0.0001）和套组（p <0.0001）的重要作用。耐力运动后，RES期间的身体表现下降，表明CON的累积作用。咖啡因补充剂减弱了这种累积作用。我们得出结论，有氧训练后立即补充咖啡因可用于改善RT表现。耐力运动后，RES期间的身体表现下降，表明CON的累积作用。咖啡因补充剂减弱了这种累积作用。我们的结论是，有氧训练后立即补充咖啡因可用于改善RT表现。耐力运动后，RES期间的身体表现下降，表明CON的累积作用。咖啡因补充剂减弱了这种累积作用。我们的结论是，有氧训练后立即补充咖啡因可用于改善RT表现。