Figure 1

Schematic of the TUG task and the inertial sensor motion capture system. A) Spatial schematic of a TUG path and different transition points. Seven transitions were identified among the activities performed during a TUG. These transitions are: 1) sit-to-stand 2) stand-to-walk-out 3) walk-out-to-turn 4) turn-to-walk-in 5) walk-in-to-turn 6) turn-to-sit 7) stand-to-sit. B) Diagram of the 17 sensors and their location on the Animazoo suit. C) A close-up view of the sensors on the shoulders, trunk and hip. D) The orientation of the axes on the sensor. Using the right-hand Cartesian coordinate system, the y-axis line is aligned along the length of the inertial sensor while the x-axis is aligned along the width of the sensor. E) Global work flow of the algorithm to detect the activities and transition between activities using an inertial sensor motion capture system.