Table 2.

2 × 2 ANOVA with interaction analysis between the HIIT and sleep conditions on memory performance

Variables	Source	SS	df	MS	F	P	${\eta }_p^2$
Immediate retrieval dʹ	HIIT/no-HIIT	0.036	1	0.036	0.015	0.903	0.001
	Average/restricted sleep	1.430	1	1.430	0.602	0.440	0.007
	Interaction	7.760	1	7.760	3.267	0.074	0.036
	Error	209.028	88	2.375
	Total	218.390	92
Delayed retrieval dʹ	HIIT/no-HIIT	1.193	1	1.193	0.532	0.468	0.006
	Average/restricted sleep	3.294	1	3.294	1.468	0.229	0.016
	Interaction	6.745	1	6.745	3.006	0.050*	0.033
	Error	197.459	88	2.244
	Total	208.770	92
Difference in dʹ (delayed – immediate retrieval)	HIIT/no-HIIT	2.814	1	2.814	1.631	0.205	0.018
	Average/restricted sleep	1.784	1	1.784	1.035	0.312	0.012
	Interaction	0.223	1	0.223	0.129	0.720	0.001
	Error	151.773	88	1.725
	Total	156.665	92

N = 92; *p ≤ 0.05.

Groups: S₈: average sleep opportunity (n = 23); S₅: sleep restriction (n = 24); HIITS₈: HIIT plus average sleep opportunity (n = 21); HIITS₅: HIIT plus sleep restriction (n = 24).

dʹ: discriminability index ${\eta }_p^2$: partial eta-squared; SS: Type III sum of squares; df: degree of freedom; MS: mean square.