Biceps Femoris Fascicle Lengths Increase after Hamstring Injury Rehabilitation to a Greater Extent in the Injured Leg

Table 1

Parameter estimates for the fixed effect linear mixed models.

Prerehabilitation biceps femoris fascicle length, parameter estimates, fixed effects
Term	Estimate	Std. error	DF	t ratio	Prob>|t|	95% lower	95% upper
Intercept	9.43	0.19	49	50.27	<0.0001	9.06	9.80
Leg (injured)	−0.37	0.07	49	−5.25	<0.0001	−0.52	−0.23
Postrehabilitation biceps femoris fascicle length, fixed effects, parameter estimates
Intercept	1.54	0.67	68.9	2.29	0.0253	0.20	2.90
Leg (injured)	0.45	0.08	51	5.65	<0.0001	0.29	0.61
Prerehab biceps femoris fascicle length	0.96	0.07	69.2	13.56	<0.0001	0.82	1.1
(Prerehab biceps femoris fascicle length-9.4)leg (injured)	0.08	0.06	54.1	1.42	0.1607	−0.03	0.19

Upper panel is the prerehabilitation biceps femoris fascicle length, denoting a significant effect of leg (injured leg shorter fascicles), and the lower panel shows the estimates for the postrehabilitation fixed effects: the injured leg with longer fascicles and a significant effect of baseline fascicle length, but no interaction effect. DF, degrees of freedom; Prob >|t|, probability that the observed statistic is greater than the absolute value of the t statistic; 95% lower, the lower limit of the 95% confidence interval of the estimate; 95% upper, the upper limit of the 95% confidence interval of the estimate.