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Effects of Combined Versus Isolated Beta-Alanine and Sodium Bicarbonate Supplementation on Physical Capacity in Highly Trained Female Basketball Players: A Randomized Controlled Trial
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DOI：10.1123/ijspp.2025-0447.png)
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Abstract
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Purpose : To examine the effects of combined versus isolated beta-alanine (BA) and sodium bicarbonate (SB) supplementation on physical capacity in highly trained female basketball players. Methods : Sixty-eight athletes aged 21.4 (4.2) years participated in a randomized, double-blind, placebo (PL)-controlled parallel trial. Participants were assigned to one of four treatments: BA+SB, BA+PLSB, PLBA+SB, or PLBA+PLSB. They received BA or PLBA (6.4 g & centerdot;d(-1)) for 28 days. In the final 7 days, SB or PLSB (0.3 g & centerdot;kg(-1)& centerdot;d(-1)) was added to the ongoing supplementation. Exercise tests included countermovement jump (CMJ), Wingate Anaerobic Test (WAnT), and incremental cycling test. The tests were performed in the following order: CMJ(1), WAnT(1), incremental cycling test, WAnT(2), and CMJ(2). Heart rate, ratings of perceived exertion, body mass, and composition were also assessed. Data were analyzed with repeated-measures analysis of variance. Results : BA+SB and PLBA+SB supplementation increased peak power during WAnT(1) compared to presupplementation (both P < .001; large effect). Additionally, mean heart rate was lower in BA+SB during incremental cycling test at postsupplementation compared to PLBA+SB (P = .04; large effect). BA+PLSB did not influence any physical capacity outcomes. Moreover, no changes in ratings of perceived exertion, body mass, and composition were observed. Conclusions : BA+SB and PLBA+SB supplementation enhanced peak power in WAnT(1) without compromising subsequent physical capacity indices. BA+SB potentially reduced cardiovascular strain during submaximal exercise. In contrast, BA+PLSB did not confer any ergogenic benefits. These findings suggest that SB-containing protocols may improve high-intensity capabilities in highly trained female basketball players.
Keywords:
anaerobic performance
athletes
buffering agents
ergogenic aids
sports nutrition
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