PPG gait analysis 2 inertial sensor 2 kinematics 2 30-s chair stand test 1 BCI 1 Baduanjin 1 CCD/CMOS 1 COPD 1 ECG electrode potentials 1 ECG electrode swaps 1 EEG 1 EMG 1 Humanities 1 IMU 1 Kinect 1 Kinect sensor 1 LSTM-RNN 1 MARG 1 MR-compatible measuring systems 1 MRI 1 MSMinv transformation 1 RGB-D sensors 1 SCI patients 1 Social interaction 1 T10MW 1 Technology: general issues 1 WCT potential change 1 abdominal movement signal 1 accelerator 1