Figure 3.

Schematic of the experimental setup: participant walking on the treadmill during muscle stimulation. All devices including the stimulator and data acquisition devices were connected to a PC which runs the control program, while the subject wore the FSR insoles in their shoes and motion tracking MPU9150 on the lateral side of the thigh. A high-speed video camera was used to capture the kinematic motion by tracking retro-reflective markers placed on the lower limb. The ground contact signals from the FSRs, the sagittal plane hip angles computed by the Arduino Uno and stimulation current amplitude for each muscle were also recorded.