Figure 1
From: Mechanisms to increase propulsive force for individuals poststroke
Diagram of variables of interest. F a was the anterior component of the ground reaction force. M a was the ankle plantarflexion moment. COP was the center of pressure. TLA cop was measured as the angle between the laboratory’s vertical axis and the vector joining the greater trochanter with the COP. d was the perpendicular distance from the ankle joint to the vector joining the greater trochanter with the COP.