. 2017 Feb 10;8:72. doi: 10.3389/fphys.2017.00072

Table 2.

Mean ± SD parameters of the ${\dot{V} O}_{2}$ kinetics for transition from rest to 80% VT (moderate) and Δ25% (heavy) for Men and Women.

Variables	Moderate		Heavy
	Men	Women	Men	Women
$\dot{V} O_{2} b a s e$ (ml kg⁻¹ min⁻¹)	8.86 ± 1.2	8.07 ± 1.1	8.1 ± 1.7	7.8 ± 1.4
$\dot{V} O_{2} b a s e$ (ml min⁻¹)	692 ± 132	445 ± 60^a	633 ± 132	430 ± 77^a
A_p (ml kg⁻¹ min⁻¹)	22.2 ± 2.1	20.3 ± 2.7^a	37.7 ± 2.9^b	34.9 ± 4.4^b
A_p (ml min⁻¹)	1736 ± 164	1121 ± 149^a	2948 ± 227^b	1927 ± 243^a^,^b
td_p (s)	12.3 ± 4.3	12.7 ± 2.8	11.1 ± 3.7	11.2 ± 4.7
τ_p (s)	14.4 ± 5.1	15.1 ± 5.6	16.0 ± 4.5	13.5 ± 3.3
A_sc' (ml kg⁻¹ min⁻¹)			3.8 ± 1.0	3.2 ± 2.4
A_sc' (ml min⁻¹)			297 ± 78	177 ± 132
%A_sc'			7.5 ± 1.8	6.6 ± 3.8
tdsc (s)			169.1 ± 70.0	167.5 ± 51.9
τ_sc (s)			92.0 ± 123.7	36.3 ± 36.2
Gain Ap (ml·min⁻¹·m⁻¹)	13.9 ± 7.6	11.4 ± 3.2	28.7 ± 4.7^a	20.5 ± 3.4^a^,^b
EE Gain (ml·min⁻¹·m⁻¹)	27.5 ± 3.9	18.6 ± 4.0^a	40.5 ± 4.7^b	28.6 ± 4.5^a^,^b
EE $\dot{V} O_{2}$ (ml kg⁻¹ min⁻¹)	31.5 ± 2.6	28.1 ± 3.5^a	49.5 ± 3.1^b	45.7 ± 6.5^b
EE $\dot{V} O_{2}$ (% VO_2max)	54.9 ± 6.1	56.6 ± 6.5	86.2 ± 7.7^b	91.6 ± 9.6^b
EE HR (b.min⁻¹)	125.2 ± 7.3	130.7 ± 10.1	162.9 ± 8.3^b	170.5 ± 10.9^b
EE [La] (mmol l⁻¹)	1.6 ± 0.6	1.5 ± 0.4	4.9 ± 1.7^b	4.4 ± 1.7^b
v (m s⁻¹)	1.07 ± 0.07	1.00 ± 0.03	1.31 ± 0.07	1.21 ± 0.05

$\dot{V} O_{2}$ _base, baselineVO₂; Amplitude (A_p, A_sc), time delay (tdp, tdsc), time constant (τp, τsc), of the primary phase and slow component, respectively. %Asc': relative contribution of slow component in relation to the end-exercise $\dot{V} O_{2}$ : EE $\dot{V} O_{2}$ − $\dot{V} O_{2}$ at the end of at the end of the constant load exercise; EE $\dot{V} O_{2}$ (% VO_2max) − $\dot{V} O_{2}$ at the end of at the end of the constant load exercise relative to VO_2max; EE HR: heart rate at the end of the constant load exercise; EE [La]: [La] at the end of exercise; v: swim velocity for each exercise intensity.

Significantly different than men for the same intensity (p < 0.05),

Significantly different from moderate intensity swimming (p < 0.05).