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Fig. 1. Representative strain recordings (simultaneous) from three gauge locations
on the cooter femur during three consecutive walking steps. Left: principal
strains, angle of principal tensile strains from the femoral long axis
(
t) and shear strains from ROS gauge recordings. Right:
longitudinal strains from `dorsal', `anterior' and `ventral' sites. Note that
strain scales differ among panels to facilitate presentation. Dark gray
shading highlights the stance phase (contact) for a single step at all gauge
locations. Light gray shading highlights the swing phase of a stride.
t and
c denote tensile and compressive (red
line) principal strain traces, respectively.