Fig. 3

Spatial gait parameters and foot pitch angles. In the sagittal plane, when viewed from the right side of the foot, counterclockwise foot rotation (dorsiflexion) is represented by positive values, and clockwise rotation (plantarflexion) by negative values. A foot orientation parallel to the ground corresponds to 0 degrees. The red, green, and blue circles indicate heel contact, foot flat, and toe-off, respectively.