Table 4 ICC analysis of the THR determined by the standardized maximum heart rate method and the HR_VT1 (n = 48).

	Exercise intensity Percentage	ICC value	95% Confidence interval		P value
	Exercise intensity Percentage	ICC value	Lower limit	Upper limit	P value
Fox^a	55% HR_max	0.181	− 0.065	0.505	< 0.001
	60% HR_max	0.421	− 0.068	0.712	< 0.001
	65% HR_max	0.639*	0.437	0.780	< 0.001
Miller^b	55% HR_max	0.107	− 0.070	0.343	0.005
	60% HR_max	0.288	− 0.022	0.543	0.003
	65% HR_max	0.386	0.124	0.599	< 0.001
Tanaka^c	55% HR_max	0.142	− 0.068	0.426	< 0.001
	60% HR_max	0.357	− 0.049	0.638	< 0.001
	65% HR_max	0.537*	0.304	0.710	< 0.001
CPET^d	65% HR_max	0.570*	0.359	0.730	< 0.001
	70% HR_max	0.719*	0.551	0.832	< 0.001
	75% HR_max	0.491	0.216	0.691	< 0.001

0.9 > **ICC > 0.75, 0.75 > *ICC > 0.5.
a. Data calculated with the Fox equation; b. data calculated with the Miller equation; c. data calculated with the Tanaka equation; d. data calculated with the peak heart rate measured by the CPET.
Abbreviation: HR_max=maximum heart rate.

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