The purposes of this study were to determine whether low intensity resistance training combined with blood flow restriction (LI-BFR) could affect the concentric hamstrings/quadriceps muscle strength ratio (Hcon:Qcon) of professional soccer players with Hcon:Qcon imbalance (Study 1), and whether hamstrings strength response observed after LI-BFR is associated with muscle hypertrophy (Study 2). In the Study 1, athletes were randomly divided into a training group (n = 6) and a control group (n = 5). In the Study 2, all athletes (n = 11) have performed the training programme. The athletes participated in a 6-week (twice a week) supervised training programme (unilateral knee flexion at 30% 1RM) consisting of 12 training sessions. Peak concentric torque of knee flexors (+8%; P < 0.001) and Hcon:Qcon (+9%; P < 0.01) were significantly increased after LI-BFR. Moreover, the cross sectional area (CSA) of the hamstrings was significantly increased (+10%; P < 0.001) after LI-BFR. Thus, the addition of hamstrings strength training programme using LI-BFR during preseason is able to enhance both Hcon:Qcon and hamstrings CSA of professional soccer players with Hcon:Qcon imbalance.

中文翻译：

---

限流低负荷阻力训练对肌肉失衡职业足球运动员肌肉大小和力量的影响

这项研究的目的是确定低强度抗阻力训练结合限流（LI-BFR）是否会影响Hcon：Qcon不平衡的职业足球运动员的同心绳肌/股四头肌肌肉力量比（Hcon：Qcon）（研究1） ），以及LI-BFR后观察到的绳肌力量反应是否与肌肉肥大有关（研究2）。在研究1中，运动员被随机分为训练组（n = 6）和对照组（n = 5）。在研究2中，所有运动员（n = 11）都执行了训练计划。运动员参加了为期6周（每周两次）的有监督训练计划（单侧屈膝30％1RM），包括12个训练课。膝盖屈肌的峰值同心扭矩（+ 8％; P <0.001）和Hcon：Qcon（+ 9％; P <0）。LI-BFR后01）明显增加。此外，LI-BFR后，绳肌的截面积（CSA）显着增加（+ 10％； P <0.001）。因此，在季前赛期间添加使用LI-BFR的ham绳肌力量训练计划，能够增强Hcon：Qcon不平衡的职业足球运动员的Hcon：Qcon和绳肌CSA。