Objective Anterior cruciate ligament reconstruction (ACLR) predisposes footballers for subsequent ACL and hamstring (HS) injury. This case series examines HS muscle activation patterns during the running in ACLR patients (bone-patellar tendon-bone (BTB) and (HS) graft) after completion of functional criteria allowing return to training. Methods Electromyography (EMG) recorded from medial and lateral HS bilaterally during treadmill running (12, 14 and 16 km/hour) from 21 male ACLR patients on average 7 months from surgery (5-9) that underwent (HS) (n=12) or BTB reconstruction (n=9) were compared with 19 healthy runners. Main outcome measures: EMG signal was normalised to peak during the running. Pairwise comparisons were made for each muscle group examining stance and swing activation for mean and peak EMG for each patient group and leg. Results Significantly lower relative peak activation in stance (not swing) phase for medial HS was seen for all conditions with effect sizes ranging from −0.63 (controls, BTB non-injured leg) to −1.09 (HS injured). For lateral HS only BTB injured were significantly lower in stance phase (−1.05) Conclusion ACLR patients show neuromuscular alterations during different phases of running. The finding of reduced medial HS activity in stance phase might have implications for knee instability and HS muscle injury on resumption of sport.

中文翻译：

---

跑步期间 ACL 重建后降低内侧腘绳肌活动：一项横断面研究

目的 前交叉韧带重建 (ACLR) 使足球运动员容易发生随后的 ACL 和腿筋 (​​HS) 损伤。本案例系列检查了 ACLR 患者（骨-髌腱-骨 (BTB) 和 (HS) 移植物）在完成允许返回训练的功能标准后跑步期间的 HS 肌肉激活模式。方法 21 名男性 ACLR 患者在手术后平均 7 个月（5-9）接受（HS）（n=12 ) 或 BTB 重建 (n=9) 与 19 名健康跑步者进行了比较。主要结果测量：EMG 信号在跑步期间被标准化为峰值。对每个肌肉组进行成对比较，检查每个患者组和腿的平均和峰值 EMG 的姿势和摆动激活。结果 在所有条件下，内侧 HS 站立（非摆动）阶段的相对峰值激活显着降低，效应大小范围从 -0.63（对照，BTB 未受伤腿）到 -1.09（HS 受伤）。对于横向 HS，仅 BTB 损伤在站立期显着降低 (-1.05) 结论 ACLR 患者在跑步的不同阶段表现出神经肌肉改变。站立期内侧 HS 活动减少的发现可能对恢复运动时的膝关节不稳定和 HS 肌肉损伤有影响。05) 结论 ACLR 患者在跑步的不同阶段表现出神经肌肉的改变。站立期内侧 HS 活动减少的发现可能对恢复运动时的膝关节不稳定和 HS 肌肉损伤有影响。05) 结论 ACLR 患者在跑步的不同阶段表现出神经肌肉的改变。站立期内侧 HS 活动减少的发现可能对恢复运动时的膝关节不稳定和 HS 肌肉损伤有影响。