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Table 6 Blood acid-base balance markers – chronic supplementation strategy

From: 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

   SB-PRE SB-POST p-Value
T1 or Z2
d1 or rc2
PLA-PRE PLA-POST p-Value
T1 or Z2
d1 or rc2
SB-POST vs. PLA-POST
p-Value
T3 or U4
d3 or rg4
pH EXERCISE_PRE 7.41 ± 0.02 7.43 ± 0.02 0.1011 7.42 ± 0.02 7.43 ± 0.03 0.1831 0.7683
    −1.7921    −1.4211 0.2983
    −0.6521    − 0.4321 0.1223
EXERCISE_POST 7.18 ± 0.05 7.20 ± 0.05 0.3681 7.18 ± 0.05 7.18 ± 0.04 0.9211 0.3143
    −0.9391    −0.1021 1.0313
    −0.3901    −0.0321 0.4213
HCO3¯ (mmol/L) EXERCISE_PRE 26.1 ± 0.8 27.2 ± 2.1 0.0681 26.3 ± 1.2 26.5 ± 1.6 0.9062 0.1664
    −2.0211    0.1182 47.5004
    −0.7191    0.0342 0.3404
EXERCISE_POST 13.1 ± 1.6 13.6 ± 1.5 0.5021 13.4 ± 1.6 13.2 ± 1.3 0.6701 0.4903
    −0.6951    0.4381 0.7033
    −0.3061    0.1621 0.2873
La (mmol/L) EXERCISE_PRE 1.6 ± 0.5 1.4 ± 0.7 0.1472 1.4 ± 0.4 1.4 ± 0.7 0.6662 0.8854
    1.4512    0.4312 69.0004
    0.8152    0.1252 0.0424
EXERCISE_POST 17.7 ± 2.5 17.5 ± 2.8 0.7992 17.0 ± 2.5 17.0 ± 1.8 0.9861 0.7074
    0.2552    −0.0181 65.0004
    0.0742    − 0.0081 −0.0974
BE (mmol/L) EXERCISE_PRE 2.2 ± 1.0 3.6 ± 2.6 0.0731 2.4 ± 1.5 2.6 ± 2.0 1.0002 0.1664
    −1.9811    0.0002 47.5004
    −0.6831    0.0002 0.3404
EXERCISE_POST −16.9 ± 2.7 −16.0 ± 2.6 0.4531 −16.2 ± 3.0 −16.7 ± 2.5 0.6581 0.4953
    −0.7781    0.4551 0.6943
    −0.3411    0.1581 0.2833
  1. 1Data analyzed by t-test for dependent variables; effect size expressed as Cohen’s d. 2Data analyzed by Wilcoxon signed-rank test; effect size expressed as rank correlation coefficient (rc). 3Data analyzed by t-test for independent variables; effect size expressed as Cohen’s d. 4Data analyzed by Mann−Whitney U test; effect size expressed as Glass’s rank-biserial correlation coefficient (rg). Abbreviations: 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-PRE – before placebo treatment, PLA-POST – after placebo treatment, SB-PRE – before sodium bicarbonate supplementation, SB-POST – after sodium bicarbonate supplementation