The Effect of Back Squat Depth and Load on Lower Body Muscle Activity in Group Exercise Participants

Each file shows the EMG data for one study participant. There were 10 participants in total.
Four muscles were analysed: Gluteus Maximus (GM), Biceps Femoris (BF), Vastus Lateralis (VL), Lateral Gastrocnemius (LG)
For each muscle, mean and peak EMG data were obtained
There were 4 squat conditions:
90 degree knee angle, 23% bodyweight load (90D 23L)
90 degree knee angle, 38% bodyweight load (90D 38L)
125 degree knee angle, 23% bodyweight load (125D 23L)
125 degree knee angle, 38% bodyweight load (125D 38L)
For each condition, 5 squats were analysed. Each repetition was divided into an eccentric (E) and concentric (C) phase. The eccentric phase of repetition 1 is abbreviated as 1:E etc.
Each participant also performed 5 Countermovement Jumps (CMJs)
The squat data were normalised against the CMJ data

本数据集每份文件对应一名研究受试者的肌电（Electromyography, EMG）数据，本次研究共纳入10名受试者。本次分析共覆盖四块骨骼肌：臀大肌（Gluteus Maximus, GM）、股二头肌（Biceps Femoris, BF）、股外侧肌（Vastus Lateralis, VL）与外侧腓肠肌（Lateral Gastrocnemius, LG）。针对每块肌肉，均提取了其肌电信号的平均值与峰值两项核心指标。
本次实验共设置4种深蹲测试工况：
膝关节呈90度屈曲、负重为受试者体重23%（90D 23L）
膝关节呈90度屈曲、负重为受试者体重38%（90D 38L）
膝关节呈125度屈曲、负重为受试者体重23%（125D 23L）
膝关节呈125度屈曲、负重为受试者体重38%（125D 38L）
每个工况下共分析5次完整深蹲动作。单次动作周期被划分为离心（Eccentric, E）与向心（Concentric, C）两个阶段，例如第1次动作的离心阶段可简写为1:E，其余类推。
每名受试者额外完成5次反向跳跃（Countermovement Jumps, CMJs）。所有深蹲动作的肌电数据均以反向跳跃数据为参照进行归一化处理。