Abstract
BackgroundCreatine (CR) and sodium bicarbonate (SB) alone improve anaerobic performance. However, the ergogenic effects of CR and SB co-ingestion on taekwondo anaerobic performance remains unknown.MethodsForty trained taekwondo athletes (21 ± 1 y.; 180.5 ± 7.3 cm; 72.7 ± 8.6 kg) were randomized to: (i) CR and SB (CR + SB; 20 g of CR+ 0.5 g·kg− 1·d− 1 of SB), (ii) CR, (iii) SB, (iv) placebo (PLA), or (v) control (CON) for 5 days. Before and after supplementation, participants completed 3 bouts of a Taekwondo Anaerobic Intermittent Kick Test (TAIKT) to determine changes in peak power (PP), mean power (MP), and fatigue index (FI). Blood lactate (BL) was measured before, immediately following, and 3 min post-TAIKT.ResultsPP and MP increased over time (P < 0.05) following CR + SB, CR, and SB ingestion, with no changes in the PLA or CON groups. There was a greater increase over time in MP following CR + SB (Absolute Δ: 1.15 ± 0.28 W∙kg67) compared to CR (Absolute Δ: 0.43 ± 0.33 W∙kg67; P < 0.001) and SB (Absolute Δ: 0.73 ± 0.24 W∙kg67; P = 0.03). There were no significant time and condition effect for FI (P > 0.05). BL increased following exercise across all groups; however, CR + SB and SB post-exercise BL was lower compared to CR, PLA, and CON (P < 0.05).ConclusionShort-term CR and SB alone enhance TAIKT performance in trained taekwondo athletes. Co-ingestion of CR and SB augments MP compared to CR and SB alone, with similar PP improvements.
Highlights
Taekwondo is a combat sport that has been in the Olympic games since 1988 and is growing in popularity
The purpose of this study was to examine the effects of CR monohydrate and Sodium bicarbonate (SB) co-ingestion on mean power (MP), peak power (PP), fatigue index (FI), rating of perceived exertion (RPE), and blood lactate (BL) during a sportspecific anaerobic intermittent kick test (TAIKT) in trained taekwondo athletes compared to CR, SB, PLA, and control (CON)
The current study found improvements in PP and MP compared to a PLA or CON when CR and SB were ingested alone using a taekwondo specific test
Summary
Taekwondo is a combat sport that has been in the Olympic games since 1988 and is growing in popularity. Intensity, and intermittent nature of a taekwondo match, athletes require well-. Dietary strategies including supplements known to alter either extracellular or intracellular buffering capacity or alter the contribution from the glycolytic energy. Sarshin et al Journal of the International Society of Sports Nutrition (2021) 18:10 system may enhance taekwondo performance [7]. Sodium bicarbonate (SB) supplementation improves extracellular buffering capacity and enhances high-intensity exercise [8], including combat sports performance [9,10,11,12]. Lopes-Silva (2018) demonstrated that acute SB supplementation (300 mg∙kg− 1) increased glycolytic metabolism and enhanced taekwondo performance [3]. The ergogenic effects of CR and SB co-ingestion on taekwondo anaerobic performance remains unknown
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