Jang Jiwoong, Park Hun-Young, Yoo Choongsung, Park Yeram, Kim Jisu, Lim Kiwon
J Exerc Nutrition Biochem. 2017 Dec 31;21(4):27-36. doi: 10.20463/jenb.2017.0036.
Resistance exercise training (RET) and an additional intake of dietary protein supplements may improve muscle mass and muscular function, and reduce inflammatory markers. The types, amount, and timing of dietary protein supplements are important for the synergistic effects of resistance training and dietary protein supplements. We hypothesized that a 25.1 g protein complex supplement taken for 12 weeks, immediately before and after resistance exercise, would enhance fat free mass and isokinetic muscular function in young untrained males.
Eighteen participants were randomly assigned to a placebo (n=8) or protein complex supplement groups (n=10). The RET was a supervised progressive program, 3 times per week for 12-weeks, and was performed progressing 80% of their one repetition maximum (1-RM). Body composition, blood pressure, plasma inflammatory markers, lipid level and isokinetic muscular function were assessed before and after the study period.
There was a significant interaction effect in C-reactive protein (CRP) (p =0.044) among blood vessel inflammatory markers. The protein complex supplement group had shown more effective improvement at 12 weeks intervention compared to the placebo group in isokinetic muscular function. There was a significant interaction effect in peak torque at 60 degrees/sec leg extension (p =0.044), total work at 240 degrees/sec leg extension (p =0.025), and total work at 240 degrees/sec leg flexion (p =0.011).
Protein complex supplementation during RET appears more effective than RET alone in improving isokinetic muscular function for 12 weeks in untrained young men.
抗阻运动训练（RET）及额外摄入膳食蛋白质补充剂可能会增加肌肉量和肌肉功能，并降低炎症标志物水平。膳食蛋白质补充剂的类型、数量和摄入时间对于抗阻训练与膳食蛋白质补充剂的协同效应很重要。我们假设，在抗阻运动前后立即服用为期12周的25.1克蛋白质复合补充剂，会增强未受过训练的年轻男性的去脂体重和等速肌肉功能。
18名参与者被随机分为安慰剂组（n = 8）或蛋白质复合补充剂组（n = 10）。RET是一个有监督的渐进式计划，每周进行3次，为期12周，训练强度为其一次重复最大值（1-RM）的80%。在研究期前后评估身体成分、血压、血浆炎症标志物、血脂水平和等速肌肉功能。
血管炎症标志物中的C反应蛋白（CRP）存在显著的交互作用（p = 0.044）。与安慰剂组相比，蛋白质复合补充剂组在12周干预后等速肌肉功能改善更显著。在60度/秒伸腿的峰值扭矩（p = 0.044）、240度/秒伸腿的总功（p = 0.025）和240度/秒屈腿的总功（p = 0.011）方面存在显著的交互作用。
在未受过训练的年轻男性中，抗阻运动训练期间补充蛋白质复合物在改善12周的等速肌肉功能方面似乎比单独进行抗阻运动训练更有效。
