Table 7.

Blood acid-base balance markers – acute supplementation strategy

		BASE	SB	PLA	p-Value F1 or Χ2 2 ${\eta }_p^2$1 or Kendall’s W2
pH	EXERCISE_PRE	7.41 ± 0.02	7.41 ± 0.03	7.41 ± 0.02	0.5931
					1.0001
					0.0461
	EXERCISE_POST	7.18 ± 0.04a	7.24 ± 0.05b	7.18 ± 0.04a	0.0002
					15.5002
					0.6462
HCO3¯ (mmol/L)	EXERCISE_PRE	25.9 ± 1.0	26.1 ± 1.2	25.6 ± 0.8	0.5582
					1.1672
					0.0492
	EXERCISE_POST	13.3 ± 1.5a	15.4 ± 1.9b	13.2 ± 1.6a	0.0002
					18.1672
					0.7572
La (mmol/L)	EXERCISE_PRE	1.3 ± 0.33	1.3 ± 0.5	1.2 ± 0.5	0.8502
					0.3262
					0.0142
	EXERCISE_POST	16.4 ± 2.5b	17.2 ± 2.2b	15.2 ± 3.0a	0.0092
					9.4562
					0.3942
BE (mmol/L)	EXERCISE_PRE	2.4 ± 1.1	2.1 ± 1.4	2.2 ± 1.1	0.9202
					0.1672
					0.0072
	EXERCISE_POST	−16.1 ± 2.7a	−13.0 ± 3.3b	−16.4 ± 2.9a	0.0002
					18.0002
					0.7502

¹Data analyzed by one-way ANOVA with repeated measurements; effect size expressed as partial eta-squared (${\eta }_p^2$); ²Data analyzed by Friedman’s ANOVA and subsequent two-group comparisons by Wilcoxon signed-rank test; effect size expressed as Kendall’s Concordance Coefficient W; ^ab – different letter inscriptions refer to statistical differences between BASE, PLA and SB. Abbreviations: BASE – baseline (no supplementation), BE – base excess EXERCISE_{_PRE} – value before exercise tests, EXERCISE_{_POST} – value 3 min after the second Wingate anaerobic test, HCO₃¯- bicarbonate, La – blood lactate, PLA – after placebo supplementation, SB – after sodium bicarbonate supplementation