Joint angles of lower limb gait and sEMG signals

Description

During the performance of five lower limb movements including level walking, ascending and descending stairs, and ascending and descending a slope (with a slope angle of 10°), the sEMG data of eight lower limb muscles—Rectus Femoris (RF), Vastus Lateralis (VL), Vastus Medialis (VM), Biceps Femoris (BF), Semitendinosus (ST), Tibialis Anterior (TA), Medial Gastrocnemius (MG), and Soleus (SOL)—and synchronized knee joint angle data were recorded. The sEMG signals of eight muscle channels on one leg were recorded using sEMG sensors at a sampling frequency of 1000 Hz. The angle data were collected using the VICON optical motion capture system, also at a sampling frequency of 1000 Hz. The movement duration for each subject was approximately 11 seconds.

Steps to reproduce

In this experiment, eight high-performance infrared cameras were deployed to track the reflective markers attached to the subjects' limbs, thereby generating precise and real-time 3D models to extract accurate joint angle data. The specific placements of the sEMG sensors and reflective markers are illustrated in Figure 2(a). The subjects performed overground level walking (at a speed not exceeding 1.5 m/s) and leg-raising maneuvers, respectively. Each data acquisition trial lasted for 12 s, yielding approximately 12,000 sampling points per trial. The experiment was repeated five times with an inter-trial rest interval of more than 10 s; consequently, the allocated training dataset comprises approximately 36,000 sampling points.

Institutions

• North China University of Technology

  Beijing, Beijing

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