Table 6.

Meta-analyses of secondary outcomes.

Outcomes	Number of studies	Sample size (HIIT/MICT)	Heterogeneity test		Value of effect		Two-tailed test
			I² (%)	P	WMD value	95%CI	Z	P
HR	8	151/136	0	.73	−0.66	[−2.65, 1.34]	0.65	.52
VO2max	4	85/86	0	.78	1.48	[−0.20, 3.16]	1.73	.08
FMD	3	49/47	0	.64	2.75	[0.43, 5.07]	2.32	.02

CI = confidence interval, FMD = flow-mediated vasodilation, HIIT = high-intensity intermittent training, HR = heart rate, MICT = moderate-intensity continuous training, VO₂max = maximal oxygen uptake, WMD = weighted mean difference.