TABLE 1.

Structural-level mechanical properties.

Group	Yield force (N)	Ultimate force (N)	Yield deformation (μm)	Stiffness (N/mm)
B6;129 WT Control	13.65 ± 0.81	15.44 ± 0.74	203.99 ± 6.46	76.61 ± 4.49
B6;129 WT Exercise	13.03 ± 0.64	14.83 ± 0.62	200.25 ± 6.38	75.07 ± 3.51
C3H WT Control	16.43 ± 0.58	17.06 ± 0.60	215.50 ± 9.47	93.24 ± 8.30
C3H WT Exercise	17.38 ± 0.69	17.77 ± 0.72	220.01 ± 9.14	96.53 ± 7.86
B6;129 KO Control	11.74 ± 0.55	13.46 ± 0.64	210.34 ± 4.18	65.15 ± 2.48
B6;129 KO Exercise	11.23 ± 0.30	12.47 ± 0.39	211.74 ± 4.57	61.87 ± 2.01
C3H KO Control	17.41 ± 0.56	18.09 ± 0.70	213.59 ± 9.64	96.14 ± 5.35
C3H KO Exercise	16.72 ± 0.54	17.16 ± 0.52	211.23 ± 7.16	93.21 ± 5.61

Data are presented as mean ± SEM. There were no significant effects of exercise in any groups in these structural-level mechanical properties.