Table 1. Parameter values defining passive mechanical properties.

Description	Parameter	Numerical Value			Units
		Rabbit Psoas1	Rabbit Psoas2	Rat Soleus3
Non-linear Passive Component4	σ	4800		5710	N m−2
	x offset	1270		1350	nm
	L	49.7		36.0	nm
Linear Passive Component5	k pas		309		N m−2 nm−1
	x slack		1270		nm

¹See Figs 3, 4 and 5.

²See Fig 6A.

³See Fig 6B.

⁴Equation 8.

⁵Equation 9.

All values are shown to 3 significant figures.