The relationship between ankle quasi-stiffness and postural stability in older adults during obstacle negotiations using dominant and non-dominant sides

This repository provides the data and analysis materials used in our study on ankle joint stiffness, margin of stability, and EMG outcomes during obstacle crossing, comparing dominant and non-dominant limbs. The repository includes raw C3D files for a de-identified subset of participants (n = 8). Data Description C3D files- The .rar files contains 8 participant subfolders: `SUBJ_01` to `SUBJ_08`.- Each participant folder contains **21 C3D files: - 20 dynamic trials (formal test trials). - 1 static calibration trial (static standing calibration). EMG signals within C3D - EMG data are embedded in the C3D files as analog channels. The channel order is: | C3D Analog Channel | Muscle (CN) | Muscle (EN) ||---|---|---|| EMG.v1 | 左股二头肌 | Left Biceps Femoris (BF) || EMG.v2 | 左股外侧肌 | Left Vastus Lateralis (VL) || EMG.v3 | 左股内侧肌 | Left Vastus Medialis (VM) || EMG.v4 | 左股直肌 | Left Rectus Femoris (RF) || EMG.v5 | 左腓骨长肌 | Left Peroneus Longus (PL) || EMG.v6 | 左腓肠肌 | Left Gastrocnemius (GAS) || EMG.v7 | 左胫骨前肌 | Left Tibialis Anterior (TA) || EMG.v8 | 左比目鱼肌 | Left Soleus (SOL) || EMG.v9 | 右股二头肌 | Right Biceps Femoris (BF) || EMG.v10 | 右股外侧肌 | Right Vastus Lateralis (VL) || EMG.v11 | 右股内侧肌 | Right Vastus Medialis (VM) || EMG.v12 | 右股直肌 | Right Rectus Femoris (RF) || EMG.v13 | 右腓骨长肌 | Right Peroneus Longus (PL) || EMG.v14 | 右腓肠肌 | Right Gastrocnemius (GAS) || EMG.v15 | 右胫骨前肌 | Right Tibialis Anterior (TA) || EMG.v16 | 右比目鱼肌 | Right Soleus (SOL) | > Note: Participant identifiers are de-identified codes (SUBJ_01–SUBJ_08). No personally identifying information is included.