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

		BASE	SB	PLA	p-Value Χ^{2 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 P_CT (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
HR_max (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

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), HR_max – maximal heart rate, P_CT – 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

ISSN: 1743-7075