Table 2.

Results of repeated measures ANOVA for pre- vs. post-test PFC activity.

HbO2 variables			Main effect (time, pre vs. post)				Interaction effect (time × intervention)
Averaged time-frame	Walking speed	Hemisphere	df	F	p, one-tailed	r	F	p, one-tailed	r
t1–7	Preferred	Left PFC	(1, 31)	4.59	0.020*	0.36	0.16	0.344	0.07
		Right PFC	(1, 29)	3.32	0.040*	0.32	1.54	0.112	0.22
	Fast	Left PFC	(1, 31)	2.03	0.082t	0.25	0.28	0.300	0.09
		Right PFC	(1, 29)	0.60	0.224	0.14	0.03	0.435	0.03
t10–25	Preferred	Left PFC	(1, 31)	0.25	0.311	0.09	0.02	0.450	0.02
		Right PFC	(1, 29)	0.46	0.251	0.13	0.13	0.360	0.07
	Fast	Left PFC	(1, 31)	0.48	0.247	0.12	0.04	0.422	0.04
		Right PFC	(1, 29)	0.18	0.337	0.08	0.09	0.385	0.05
t26–34	Preferred	Left PFC	(1, 31)	5.52	(0.013)	0.39	1.32	0.130	0.20
		Right PFC	(1, 29)	0.68	0.208	0.15	0.76	0.196	0.16
	Fast	Left PFC	(1, 31)	0.08	0.393	0.05	3.54	0.035*	0.32
		Right PFC	(1, 29)	0.23	0.318	0.09	0.04	0.418	0.04

Bold values indicate trend or significance,

^tp < 0.10 trend,

^*p < 0.05, significant p-value in brackets does not correspond with one-sided hypothesis; PFC, prefrontal cortex.