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Table 4 Results of Wingate anaerobic test before (WAnT_1) and after (WAnT_2) hockey-specific performance test – acute 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

   BASE SB PLA p-Value
Χ2 2 or F1
Kendall’s W2 or \( {\eta}_p^2 \)1
Work effort (W) WAnT _1 229 ± 14 229 ± 14 226 ± 12 0.3971
     0.8231
     0.0701
WAnT _2 215 ± 21 225 ± 18 217 ± 20 0.1061
     2.4921
     0.1851
Mean power (W) WAnT _1 627 ± 107 636 ± 105 626 ± 104 0.3831
     0.8771
     0.0741
WAnT _2 670 ± 71 700 ± 48 675 ± 66 0.1461
     2.1021
     0.1601
Peak power (W) WAnT _1 792 ± 153 813 ± 146 783 ± 154 0.0661
     3.0811
     0.2191
WAnT _2 849 ± 72 873 ± 75 857 ± 81 0.5161
     0.6821
     0.0581
Time to PP (s) WAnT _1 6.19 ± 1.67 6.40 ± 1.78 6.30 ± 1.60 0.7601
     0.2781
     0.0251
WAnT _2 8.00 ± 4.46 6.45 ± 2.40 7.04 ± 1.53 0.5582
     1.1672
     0.0492
Power carry threshold at 97%PP (W) WAnT _1 769 ± 149 788 ± 142 760 ± 150 0.0651
     3.1041
     0.2201
WAnT _2 823 ± 70 846 ± 73 831 ± 79 0.5161
     0.6811
     0.0581
Average power over the PCT (W) WAnT _1 782 ± 151 801 ± 144 772 ± 152 0.0631
     3.1371
     0.2221
WAnT _2 838 ± 71 860 ± 74 845 ± 80 0.5621
     0.5921
     0.0511
HRmax (bpm) WAnT _1 170 ± 12 166 ± 10 168 ± 11 0.1522
     3.7622
     0.1712
WAnT _2 175 ± 10 174 ± 7 174 ± 10 0.9471
     0.0541
     0.0061
  1. 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. Abbreviations: BASE – baseline (no supplementation), HRmax – maximal heart rate, PCT – power carry threshold at 97%PP, PLA – after placebo treatment, PP – peak power, SB – after sodium bicarbonate supplementation, WAnT_1 – the Wingate anaerobic test performed before hockey-specific performance test, WAnT_2 – the Wingate anaerobic test performed after hockey-specific performance test