Baduanjin 1 IMU 1 Kinect 1 MARG PPG 1 Technology: general issues 1 accuracy 1 actigraphy 1 actuation 1 affective technologies 1 biosensing 1 characterization 1 compensation 1 concurrent validity 1 data fusion 1 design toolkits 1 e-health 1 ecological research 1 eye tracker 1 feasibility 1 force sensitive resistors 1 functional calibration 1 gait 1 gait analysis 1 head motion measurement 1 head rotation 1 heart rate 1 human-computer interaction 1 inertial measurement unit (IMU) 1 inertial sensor 1