Table 2.

Mean ± SD values for the oxygen saturation’ parameters obtained during the T_lim for high-intensity exercise training sessions performed in hypoxia with NO₃⁻ (HNO), in hypoxia with placebo (HPL), and in normoxia with placebo (CON).

Parameters	Intervention	Groups
		HNO	HPL	CON
SmO2base (%)	Pre	59.2 ± 8.8	58.6 ± 12.3	50.1 ± 7.3#
	Post	58.8 ± 9.3	59.0 ± 11.7	54.9 ± 9.9
SmO2min (%)	Pre	2.8 ± 2.3#	3.1 ± 1.9	3.5 ± 1.2
	Post	6.33 ± 4.8	2.1 ± 0.4	5.25 ± 2.6
SmO2max (%)	Pre	71.2 ± 7.5	66.1 ± 10.9	64.1 ± 10.1
	Post	67.8 ± 13.4	64.0 ± 13.2	61.8 ± 6.9
SmO2recovery (%)*	Pre	57.3 ± 13.6	51.1 ± 18.7	39.6 ± 14.7
	Post	56.6 ± 11.1	54.9 ± 13.4	27.1 ± 15.5
Relative-SmO2base (% of SmO2max)	Pre	83.4 ± 11.7	88.2 ± 6.8	79.1 ± 11.5
	Post	87.8 ± 10.8	92.7 ± 5.6	88.7 ± 12.1
Relative-SmO2min (% of SmO2max)	Pre	3.80 ± 1.7#	3.4 ± 1.6	3.7 ± 1.5
	Post	10.1 ± 8.9	6.2 ± 4.1	6.6 ± 3.9
ΔSmO2 (%)	Pre	−79.7 ± 13.05	−68.8 ± 35.2	−70.2 ± 11.7
	Post	−77.7 ± 12.6	−70.2 ± 36.2	−74.3 ± 12.7
[ΔTHb] (AU)	Pre	0.11 ± 0.01	0.14 ± 0.01	0.13 ± 0.09
	Post	0.11 ± 0.05	0.14 ± 0.03	0.10 ± 0.05

SmO_2base, SmO_2min, SmO_2max, and SmO_2recovery: Baseline, minimum, maximum, and recovery SmO_2base, respectively; Relative-SmO_2base and Relative-SmO_2min: SmO_2base and SmO_2min expressed as % of SmO_2max, respectively; ΔSmO₂ and [ΔTHb]: change in SmO₂ and [THb], respectively.

^*Differences between hypoxia (HNO + HPL) vs. normoxia (CON).

^#Differences between pre- and post-intervention period (p < 0.05).