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. Author manuscript; available in PMC: 2018 Oct 1.
Published in final edited form as: Arch Phys Med Rehabil. 2017 Jun 3;98(10):1962–1968. doi: 10.1016/j.apmr.2017.05.002

Figure 1. Center of Pressure (COP) Displacement.

Figure 1

Following movement initiation, the COP translates posterior and lateral towards the initial swing limb (S1 or APA phase). As the heel of the initial swing limb leaves the ground, the COP translates laterally towards the initial stance limb (S2 or Transitional phase). Finally, as the initial stance limb leaves the ground to complete the initial step, the COP translates anteriorly (S3 or Locomotor phase).