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Fig. 1. Consequences of the nonlinear stress-strain relationship of tendon for the
scaling of tendon strain. Data of Riemersma and Schamhardt
(1985) for equine superficial
digital flexor tendon. Because the tendon is stiffer at higher stresses, a
given increase in stress causes a smaller increase in strain when it occurs at
a higher initial stress (compare shaded regions). A consequence of this is
that the scaling exponent for strain is lower than the scaling exponent for
stress. For example, over the part of the curve within and between the shaded
regions, a stress proportional to 
causes a strain proportional to 
.
Therefore, a nonlinear tendon stress-strain relationship can reduce the
effects of size differences on tendon strain.
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