Table 3. Final model and statistical results of each movement variability dependent variable.

Variability (SD) of Maximum Velocity (SD_MaxVel)
Variable	Coefficient	SE	DF	t-value	p-value	Final model
Intercept	12.110	0.283	200	42.828	< 0.001	${\mathrm{S}\mathrm{D}\_\mathrm{M}\mathrm{a}\mathrm{x}\mathrm{V}\mathrm{e}\mathrm{l}}_{\mathrm{j}\mathrm{i}}={\mathrm{\beta }}_0+{\mathrm{B}}_1*{\mathrm{C}\mathrm{o}\mathrm{n}}_{\mathrm{j}\mathrm{i}}+{\mathrm{B}}_2*{\mathrm{G}\mathrm{r}\mathrm{p}}_{\mathrm{j}\mathrm{i}}++{\mathrm{u}}_{0\mathrm{i}}+{\mathrm{\epsilon }}_{\mathrm{j}\mathrm{i}}$
Condition	0.400	0.185	200	2.167	0.0314
Group	2.001	0.486	200	4.120	< 0. 001
Variability (CV) of Peak knee flexion (CV_PeakFlex)
Variable	Coefficient	SE	DF	t-value	p-value	Final model
Intercept	6.432	0.189	199	34.091	< 0.001	${\mathrm{C}\mathrm{V}\mathrm{P}\mathrm{e}\mathrm{a}\mathrm{k}\mathrm{F}\mathrm{l}\mathrm{e}\mathrm{x}}_{\mathrm{j}\mathrm{i}}={\mathrm{\beta }}_0+{\mathrm{B}}_1*{\mathrm{C}\mathrm{o}\mathrm{n}}_{\mathrm{j}\mathrm{i}}+{\mathrm{B}}_2*{\mathrm{G}\mathrm{r}\mathrm{p}}_{\mathrm{j}\mathrm{i}}++{\mathrm{u}}_{0\mathrm{i}}+{\mathrm{\epsilon }}_{\mathrm{j}\mathrm{i}}$
Condition	0.370	0.135	199	2.738	0.0067
Group	0.268	0.319	199	0.839	0.4023
Variability (CV) of Stride time (CV_Stride Time)
Variable	Coefficient	SE	DF	t-value	p-value	Final model
Intercept	2.510	0.085	200	29.356	< 0.001	${\mathrm{C}\mathrm{V}\_\mathrm{S}\mathrm{t}\mathrm{r}\mathrm{i}\mathrm{d}\mathrm{e}\mathrm{T}\mathrm{i}\mathrm{m}\mathrm{e}}_{\mathrm{j}\mathrm{i}}={\mathrm{\beta }}_0+{\mathrm{B}}_1*{\mathrm{C}\mathrm{o}\mathrm{n}}_{\mathrm{j}\mathrm{i}}+{\mathrm{B}}_2*{\mathrm{G}\mathrm{r}\mathrm{p}}_{\mathrm{j}\mathrm{i}}++{\mathrm{u}}_{0\mathrm{i}}+{\mathrm{\epsilon }}_{\mathrm{j}\mathrm{i}}$
Condition	0.177	0.083	197	2.128	0.0346
Group	0.241	0.135	200	1.785	0.0758