The influence of progressive-chronic and acute sodium bicarbonate supplementation on anaerobic power and specific performance in team sports: a randomized, double-blind, placebo-controlled crossover study

Table 7 Blood acid-base balance markers – acute supplementation strategy

		BASE	SB	PLA	p-Value F¹ or Χ^{2 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 ± 0.04^a	7.24 ± 0.05^b	7.18 ± 0.04^a	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 ± 1.5^a	15.4 ± 1.9^b	13.2 ± 1.6^a	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 ± 2.5^b	17.2 ± 2.2^b	15.2 ± 3.0^a	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 ± 2.7^a	−13.0 ± 3.3^b	−16.4 ± 2.9^a	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

ISSN: 1743-7075