. 2023 Aug 4;5:1143393. doi: 10.3389/fspor.2023.1143393

Table 2.

Performance and physiological parameters for the lowest, median, and highest workloads (mean ± SD).

Parameter	Measurement	Lowest	Median	Highest
SmO₂ (%)	n	20	20	21
	Grand mean	58 ± 14^a^,^b	49 ± 18^c	24 ± 15
	Trial 1	58 ± 14	49 ± 19	23 ± 14
	Trial 2	59 ± 15	49 ± 19	25 ± 17
	Mean diff	2 ± 6	0 ± 9	3 ± 9
HR (bpm)	n	20	21	21
	Grand mean	101 ± 10^a^,^b	148 ± 12^c	184 ± 10
	Trial 1	101 ± 9	148 ± 12	184 ± 10
	Trial 2	101 ± 11	147 ± 13	183 ± 10
	Mean diff	0 ± 4	1 ± 6	1 ± 4
V̇O₂ (ml·min⁻¹)	n	19	20	19
	Grand mean	1,285 ± 225^a^,^b	2,677 ± 585^c	3,904 ± 1,033
	Trial 1	1,294 ± 224	2,672 ± 599	3,915 ± 1,067
	Trial 2	1,277 ± 232	2,682 ± 585	3,893 ± 1,027
	Mean diff	17 ± 170	10 ± 148	22 ± 255
[BLa] (mmol·L⁻¹)	n	20	20	21
	Grand mean	1.5 ± 0.5^b	2.1 ± 0.8^c	12.3 ± 3.3
	Trial 1	1.6 ± 0.5	2.0 ± 0.8	12.4 ± 3.2
	Trial 2	1.4 ± 0.4	2.2 ± 0.8	12.2 ± 3.4
	Mean diff	0.1 ± 0.5	0.3 ± 0.6	0.3 ± 2.4
RPE (CR10)	n	21	21	21
	Grand mean	0.4 ± 0.4^a^,^b	3.5 ± 0.8^c	8.8 ± 1.0
	Trial 1	0.4 ± 0.5	3.5 ± 0.8	8.8 ± 0.9
	Trial 2	0.4 ± 0.4	3.6 ± 0.8	8.9 ± 1.0
	Mean diff	0.0 ± 0.4	0.1 ± 0.6	0.0 ± 1.2

The number of participants (n) with data from two trials used for test-retest comparisons at lowest, median, and highest workloads with mean Trial 1 and 2, mean of both trials together (Grand mean) and difference between trials (Mean diff). Muscle oxygen saturation (SmO₂), heart rate (HR), systemic oxygen uptake (V̇O₂), concentration of blood lactate ([BLa]), and rate of perceived exertion (RPE).

^{^a}

Indicates significant differences between lowest and median work stages.

^{^b}

Indicates significant differences between lowest and highest work stages.

^{^c}

Indicates significant differences between median and highest workloads. There were no significant differences between trials.