Fig. 2. Representative force traces and kinematic diagrams for a steady-speed run
(A) and a high acceleration (B). High accelerations involved high peak
propulsive horizontal forces (dotted lines), no braking horizontal forces and
a delay in vertical force (solid line) development. The insets in the force
graphs represent the mean orientation of the ground reaction force vector
during stance. The turkey diagrams illustrate the changes in limb angle during
acceleration that help to maintain the alignment between the forward-oriented
ground reaction force (bold arrow) and the center of mass. These diagrams were
traced from video frames at the times indicated by arrows on the force graphs.
The gray shaded circle represents the approximate location of the animal's
center of mass.
