Table 1.

Fascicle & IFM Failure Properties in fresh, control, and elastase treated samples from young and old horses.n = 5/age group; total samples tested: 15/treatment/tendon. Data are shown as mean ± SD. Significant differences are flagged with: *p < 0.05, **p < 0.01 and ***p < 0.001. CE indicates differences between control and elastase treated groups; FE, differences between fresh and elastase groups.

Fascicles	Young SDFT				Old SDFT
	Fresh (F)	Control	Elastase	Within Age	Fresh (F)	Control	Elastase	Within Age	Between age
		(C)	(E)	group		(C)	(E)	group	groups
				comparisons				comparisons	comparisons
Diameter (mm)	0.24 ± 0.04	0.23 ± 0.04	0.23 ± 0.04		0.23 ± 0.05	0.21 ± 0.05	0.22 ± 0.05
Failure Load (N)	2.2 ± 0.7	2.2 ± 0.9	2.1 ± 0.8		2.0 ± 1.0	1.8 ± 0.9	1.8 ± 0.8
Failure Stress (MPa)	50 ± 14	51 ± 14	49 ± 19		47 ± 18	55 ± 25	51 ± 21
Strain at Failure (%)	11 ± 2	12 ± 2	12 ± 2		11 ± 3	11 ± 2	11 ± 2
Maximum Modulus (MPa)	649 ± 140	644 ± 150	630 ± 205		631 ± 156	748 ± 260	676 ± 220
Transition strain (%)	1.4 ± 0.1	1.4 ± 0.2	1.4 ± 0.2		1.4 ± 0.2	1.3 ± 0.3	1.4 ± 0.2
Toe Modulus (MPa)	355 ± 87	381 ± 117	359 ± 118		363 ± 109	449 ± 216	425 ± 163
Hysteresis Cycle 1 (%)	26 ± 4	24 ± 4	26 ± 3		23 ± 5	23 ± 4	24 ± 4
Hysteresis Cycle 10 (%)	10 ± 2	9 ± 2	9 ± 2		9 ± 2	9 ± 2	9 ± 2
IFM Samples	Young SDFT				Old SDFT
	Fresh (F)	Control	Elastase	Within Age	Fresh (F)	Control	Elastase	Within Age	Between age
		(C)	(E)	group		(C)	(E)	group	groups
				comparisons				comparisons	comparisons
Failure Load (N)	1.6 ± 0.7	1.5 ± 0.6	1.0 ± 0.4	***FE; ***CE	1.6 ± 0.6	1.5 ± 0.6	0.9 ± 0.4	***FE; ***CE
Failure Extension (mm)	2.0 ± 0.6	2.1 ± 0.6	1.9 ± 0.6		1.7 ± 0.5	1.8 ± 0.4	1.5 ± 0.4		*C; **E
Maximum Stiffness (N/mm)	1.3 ± 0.4	1.2 ± 0.3	0.9 ± 0.2	***FE; **CE	1.5 ± 0.4	1.3 ± 0.3	0.9 ± 0.2	***FE; ***CE
Hysteresis Cycle 1 (%)	32 ± 6	32 ± 4	39 ± 7	**FE; **CE	30 ± 6	33 ± 7	35 ± 7	***FE	*E
Hysteresis Cycle 10 (%)	13 ± 3	13 ± 2	17 ± 7	***FE; **CE	14 ± 5	16 ± 7	18 ± 13