Figure 1.

Experimental setup and methods. Participants walked along precision stepping targets projected on the ground (a,b). To account for the anatomical reference frame falling out of alignment with the global reference frame, all data were rotated into a trajectory-based reference frame that aligned with the participant’s instantaneous velocity throughout the trial (a). Calculation of angular momentum was performed such that positive frontal momentum was associated with rotations about the centre of mass to the participant's right-hand side (c). Positive sagittal momentum was assocaited with rotations about the centre of mass backwards. (d) A sample trial with a participant walking along the precision stepping targets.