Table 2.

List of anatomical angles. The system uses a rigid-body skeletal model to convert the IMU measurements into joint and segment angles. Shoulder total flexion is a combination of shoulder flexion/extension and shoulder ad-/abduction. Thoracic angles are computed between the cervical vertebra and the thoracic vertebra. Lumbar angles are computed between the thoracic vertebra and pelvis.

Joint/Segment	Anatomical Angle
Shoulder	Shoulder flexion/extension Shoulder internal/external rotation Shoulder ad-/abduction Shoulder total flexion
Elbow	Elbow flexion/extension
Wrist	Wrist flexion/extension Forearm pronation/supination Wrist radial/ulnar deviation
Thorax	Thoracic flexion/extension Thoracic axial rotation Thoracic lateral flexion/extension
Lumbar	Lumbar flexion/extension Lumbar axial rotation Lumbar lateral flexion/extension