Table 3.

Cardio-respiratory and metabolic values and perceived exertion (means ± SD) of the women in the Circuit_HIIT and Circuit_combined groups before and after the intervention.

	Intervention	Before	After	p(T)/p(T × G)	${\eta }_{\text{p}}^2$(T)/${\eta }_{\text{p}}^2$(T × G)	F	Mean effecta± 90% CIb	Qualitative inference
VALUES AT A SUBMAXIMAL RUNNING SPEED OF 6 KM·H−1
Heart rate [bpm]	CircuitHIIT	166 ± 18	160 ± 18	0.087	0.140	3.250	−2.3 ± 4.4	Likely positive
	Circuitcombined	167 ± 14	165 ± 12	0.424	0.032	0.665
Oxygen uptake [ml·min−1]	CircuitHIIT	2,070 ± 206	2,110 ± 141	0.742	0.006	0.112	3.4 ± 6.8	Likely positive
	Circuitcombined	2,130 ± 311	2,110 ± 304	0.391	0.039	0.770
Respiratory exchange ratio	CircuitHIIT	0.93 ± 0.09	0.91 ± 0.10	0.136	0.113	2.430	2.5 ± 8.3	Unclear
	Circuitcombined	0.94 ± 0.10	0.89 ± 0.07	0.556	0.019	0.359
Blood lactate concentration [mmol·L−1]	CircuitHIIT	4.4 ± 2.0	3.1 ± 1.2	0.017	0.265	6.850	−25.3 ± 17.7	Very likely positive
	Circuitcombined	4.0 ± 2.3	3.7 ± 1.7	0.088	0.146	3.25
Ratings of perceived exertion [a.u.]	CircuitHIIT	12.0 ± 1.6	9.5 ± 2.0	<0.001***	0.683	36.6	−7.6 ± 11.5	Likely positive
	Circuitcombined	13.1 ± 2.0	11.1 ± 1.9	0.510	0.026	0.452
PEAK VALUES AT THE POINT OF EXERTION
Maximal oxygen uptake [ml·min−1]	CircuitHIIT	2,630 ± 297	2,900 ± 298	<0.001***	0.612	30.0	5.8 ± 4.9	Very likely positive
	Circuitcombined	2,560 ± 348	2,670 ± 398	0.038*	0.207	4.95
Respiratory exchange ratio	CircuitHIIT	1.23 ± 0.08	1.17 ± 0.08	0.102	0.134	2.95	−2.4 ± 7.6	Unclear
	Circuitcombined	1.18 ± 0.09	1.15 ± 0.07	0.591	0.016	0.299
Blood lactate concentration [mmol·L−1]	CircuitHIIT	7.0 ± 2.1	8.0 ± 2.8	0.645	0.011	0.220	26.5 ± 37.4	Likely positive
	Circuitcombined	7.0 ± 2.2	6.5 ± 2.5	0.128	0.118	2.54
Ratings of perceived exertion [a.u.]	CircuitHIIT	18.2 ± 1.5	17.9 ± 2.2	0.396	0.038	0.755	0.9 ± 9.2	Unclear
	Circuitcombined	17.8 ± 1.8	17.3 ± 1.6	0.801	0.003	0.065

HIIT, high-intensity interval training; p, probability; ${\eta }_p^{\mathit{\text{2}}}$, effect size partial eta-square; T, global effect of time; G, global effect of group; T × G, global effect of Time × Group; F, degrees of freedom; a.u, arbitrary units.

^*P < 0.05,

^***P < 0.001 for the differences between groups.

^aRefers to Circuit_HIIT minus Circuit_combined.

^b± 90% CI: add or subtract this number from the mean effect to obtain the 90% confidence intervals for the true difference.