From: Age-related increase in muscle stiffness is muscle length dependent and associated with muscle force in senior females
Shear modulus
MIVC of young
MIVC of senior
30º
60º
90º
VM
− 0.160
0.163
0.350
− 0.091
− 0.186
0.024
RF
− 0.052
− 0.008
− 0.395
− 0.485*
− 0.058
− 0.117
VL
0.157
− 0.166
− 0.015
− 0.280
0.102
− 0.297