Table 3 Main effects for Group (NW vs. FW), Time (T1 vs. T2), and Condition (eyes open vs. eyes closed), and interaction effects for the parameters from center of pressure.

Variable	Group	Time	Condition	Group* Time	Group* Condition	Time* Condition	Group*Time*Condition
AV (mm.s -1 )	0.368	0.011	<0.001	0.527	0.013	0.864	0.204
AP RMS (mm)	0.155	<0.001	0.043	0.157	0.733	0.352	0.980
ML RMS (mm)	0.999	<0.001	0.002	0.231	0.295	0.582	0.514
AP ADA (mm)	0.323	<0.001	0.026	0.292	0.371	0.937	0.409
ML ADA (mm)	0.690	<0.001	0.076	0.257	0.737	0.722	0.297

AV=average velocity; RMS=root mean square; AP=anteroposterior; ML=mediolateral; ADA=average displacement amplitude; FW=free walking; NW=Nordic walking; T1=pre-test; T2=post-test.