Table 1.

Fitting parameters of tension recovery following stretch and release in control and at 10th tetanus during fatigue

	Stretch (mean±SEM)		Release (mean±SEM)
	Control	Early fatigue	Control	Early fatigue
A 0	0.06 ± 0.01	0.12 ± 0.01*	0.01 ± 0.03	0.007 ± 0.012
A 1	0.23 ± 0.02	0.22 ± 0.03	0.17 ± 0.02	0.16 ± 0.01
k 1	4.2 ± 0.9	4.5 ± 0.8	6 ± 1	4.3 ± 0.3
A 2	0.55 ± 0.01	0.47 ± 0.02*	0.45 ± 0.04	0.38 ± 0.05
k 2	0.31 ± 0.02	0.50 ± 0.05*	0.145 ± 0.008	0.21 ± 0.02*
A 3	0.16 ± 0.02	0.17 ± 0.02	0.33 ± 0.04	0.44 ± 0.02*
k 3	0.030 ± 0.001	0.045 ± 0.001*	0.022 ± 0.001	0.025 ± 0.001*

The fitting equation is: $P=E_0+A_1(1-e^{-k_{1}t})+A_2(1-e^{-k_{2}t})+A_3(1-e^{-k_{3}t})$. A ₀ (steady force at which force relaxes after the stretch or release) and A ₁, A ₂ and A ₃ (amplitudes of the 3 exponential components) are expressed as the fraction of tension peak; rate constants k ₁, k ₂ and k ₃ are expressed as 10³ s⁻¹. Asterisks indicate statistically significant changes (P < 0.05) with respect to control.