The aim of this study was to analyse the quadriceps-hamstring coactivation in the lunge and Bulgarian squat exercises. A cross-sectional study design was applied to seventeen healthy professional football players. Muscular activity was measured using wireless surface electromyography (sEMG). The Maximum Voluntary Isometric Contraction was used to normalize the data. The muscle activation of each muscle belly was significantly different between the two exercises (F 4.24 = 28.076, p .05). In both the lunge and the Bulgarian squat, a significantly greater activation of the vastus medialis (VM) and the vastus lateralis (VL) muscles were found compared to the rectus femoris (RF) and biceps femoris (BF) and semitendinosus (ST). Muscles showed a greater activation during the Bulgarian squat compared to the lunge, but the hamstrings to quadriceps ratio was similar in both exercises (p > .05). The present work shows that the Bulgarian Squat exercise produces greater muscle activation than the Lunge exercise, whereas in both exercises there is a similar pattern of muscle activation. No differences were found between legs. If one wants to work specifically on strength development, the Bulgarian Squat would be a better option, as would be the case if one were to focus on synergistic work on the quadriceps and hamstrings, as the Bulgarian Squat exercise shows a higher H:Q ratio.

中文翻译：

---

保加利亚深蹲和弓步练习中职业足球队股四头肌和腘绳肌的肌电活动

本研究的目的是分析弓步和保加利亚深蹲练习中的股四头肌-腘绳肌协同激活。横断面研究设计应用于 17 名健康的职业足球运动员。使用无线表面肌电图 (sEMG) 测量肌肉活动。最大自愿等距收缩用于标准化数据。两种练习之间每个肌腹的肌肉激活显着不同（F 4.24 = 28.076，p .05）。在弓步和保加利亚深蹲中，与股直肌 (RF) 和股二头肌 (BF) 以及半腱肌 (ST) 相比，股内侧肌 (VM) 和股外侧肌 (VL) 肌肉的激活显着增强。与弓步相比，保加利亚深蹲时肌肉表现出更大的活跃度，但是两个练习中腘绳肌与股四头肌的比例相似（p > .05）。目前的工作表明，保加利亚深蹲运动比弓步运动产生更大的肌肉激活，而在这两种运动中，肌肉激活的模式相似。双腿之间没有发现差异。如果你想专注于力量发展，保加利亚深蹲将是一个更好的选择，如果你专注于股四头肌和腘绳肌的协同训练也是如此，因为保加利亚深蹲练习显示出更高的 H:Q 比率.