Table 5:

Parameters of the four-fiber family constitutive model describing the 75^th percentile response of human SFAs in 7 age groups. A total of 19 different loading protocols were used to determine the constitutive parameters for this model. The coefficient of determination R² ≥ 0.99 for all age groups.

Age group (years)	Cgr, kPa	${\mathit{C}}_{\mathbf{1}}^{\mathbf{1}},\mathit{k}\mathit{P}\mathit{a}$	${\mathit{C}}_{\mathbf{2}}^{\mathbf{1}}$	${\mathit{C}}_{\mathbf{1}}^{\mathbf{2}},\mathit{k}\mathit{P}\mathit{a}$	${\mathit{C}}_{\mathbf{2}}^{\mathbf{2}}$	${\mathit{C}}_{\mathbf{3}}^{\mathbf{2}}={\mathit{C}}_{\mathbf{4}}^{\mathbf{2}},\mathit{k}\mathit{P}\mathit{a}$	${\mathit{C}}_{\mathbf{3}}^{\mathbf{2}}={\mathit{C}}_{\mathbf{4}}^{\mathbf{2}}$	γ°
16±2 (12–20)	0.62	17.17	0.23	10.78	0.55	4.92	0.83	51.72
26±4 (21–30)	5.39	6.64	0.44	3.12	2.90	1.41	2.69	56.06
37±2 (31–40)	5.23	15.30	0.73	0.10	0.08	5.26	5.39	71.35
46±3 (41–50)	6.24	10.05	0.81	10.29	6.29	1.99	6.07	56.79
57±3 (51–60)	0.01	11.14	2.63	5.35	7.79	15.77	2.45	53.27
64±3 (61–70)	4.18	16.28	3.68	7.09	7.65	1.30	13.88	46.66
76±7 (71–92)	2.18	21.53	5.49	11.80	6.92	1.11	26.25	42.96