Table 6.

FR model parameters (Mean ± SE) obtained from the data fitting process

Group	${}^{(\ast \mathrm{a},\ast \mathrm{i},\ast \mathrm{ai})}{E}^{\mathrm{E}}(\mathrm{MPa})$	${}^{(\ast \mathrm{a},\ast \mathrm{i},\ast \mathrm{ai})}{E}^{\mathrm{C}}(\mathrm{MPa})$	$\mathit{\beta }$	$R^2$
Mature
Ctl	$2.65\pm 0.80$	$187.64\pm 18.16$	$18.0\pm 0.8$	$0.985\pm 0.007$
3 weeks	$0.65\pm 0.15$	$58.36\pm 6.43$	$16.2\pm 1.2$	$0.955\pm 0.018$
6 weeks	$1.12\pm 0.14$	$95.36\pm 8.21$	$15.4\pm 0.5$	$0.980\pm 0.005$
Aging
Ctl	$0.82\pm 0.17$	$103.30\pm 13.04$	$19.6\pm 2.0$	$0.964\pm 0.016$
3 weeks	$0.92\pm 0.13$	$78.52\pm 6.82$	$21.3\pm 3.6$	$0.973\pm 0.014$
6 weeks	$0.53\pm 0.17$	$70.64\pm 7.41$	$18.8\pm 1.0$	$0.882\pm 0.031$
Aged
Ctl	$0.67\pm 0.14$	$99.70\pm 9.47$	$17.6\pm 1.0$	$0.921\pm 0.024$
3 weeks	$0.19\pm 0.07$	$36.49\pm 7.74$	$21.8\pm 3.5$	$0.874\pm 0.046$
6 weeks	$0.91\pm 0.24$	$74.94\pm 9.79$	$16.4\pm 1.0$	$0.963\pm 0.021$

${}^{\ast \mathrm{a}}$Significance with age ($p<0.001$); ${}^{\ast \mathrm{i}}$significance with injury ($p<0.001$); ${}^{\ast \mathrm{ai}}$significant age–injury interaction ($p<0.001$)