前交叉韧带重建术后与健康人群跑步时下肢肌肉激活模式比较
简介
该研究比较了前交叉韧带重建（ACLR）术后患者与健康对照组在30分钟跑步过程中下肢肌肉的肌电信号振幅和频率特征。共纳入20例ACLR患者和20名匹配的健康对照，采集股直肌、股内侧肌、半腱肌、股二头肌、胫骨前肌和腓肠肌内侧头在支撑相的数据，采用功能线性模型和主成分分析进行组间和时间（第5分钟 vs 第25分钟）比较。关键发现：与健康对照组相比，ACLR患者在支…
英文摘要
BACKGROUND: Prior post-anterior cruciate ligament reconstruction (ACLR) running studies have primarily examined discrete amplitude outcomes of electromyographic signals during short running protocols. This study conducted a comprehensive examination of both amplitude and frequency characteristics across the entire electromyographic signals from lower extremity muscles between individuals with and without ACLR during a 30-min run. METHODS: Twenty individuals with ACLR and 20 matched healthy controls participated. Electromyography data of the rectus femoris (RF), vastus medialis (VM), semitendinosus (ST), biceps femoris (BF), tibialis anterior (TA), and medial gastrocnemius (MG) during the stance phase were compared between groups (ACLR vs. healthy controls) over time (5th vs. 25th min of running) using functional linear models and frequency analysis with principal component (PC) analysis. FINDINGS: Compared to healthy controls, individuals with ACLR exhibited higher amplitudes in VM, ST, BF, TA, and MG during the late-stance phase but lower amplitudes in all muscles at the early- to mid-stance (all p < 0.05). From the 5th to 25th min, amplitude increased in all muscles but decreased in RF and BF in specific stance regions (all p < 0.05). PC scores for RF, VM, and MG were lower in individuals with ACLR than in controls (all p < 0.05). PC score of ST was lower at the 25th min than at the 5th min (p = 0.02). INTERPRETATION: Individuals with ACLR exhibited lower amplitudes in lower extremity muscles during the early- to mid-stance phase, higher amplitudes during the late-stance phase, and a shift toward recruiting slower frequency contents in the quadriceps and MG.