Amir Sarshin1, Vahid Fallahi2, Scott C Forbes3, Alireza Rahimi2, Majid S Koozehchian4, Darren G Candow5, Mojtaba Kaviani6, Seyed Nemat Khalifeh2, Vahid Abdollahi7, Alireza Naderi8. 1. Faculty of Physical Education and Sport Sciences, Department of Exercise Physiology, Karaj Branch, Islamic Azad University, Karaj, Iran. amsarshin@gmail.com. 2. Faculty of Physical Education and Sport Sciences, Department of Exercise Physiology, Karaj Branch, Islamic Azad University, Karaj, Iran. 3. Faculty of Education, Department of Physical Education, Brandon University, Brandon, MB, R7A6A9, Canada. 4. Department of Kinesiology, Jacksonville State University, Jacksonville, AL, 36265, USA. 5. Faculty of Kinesiology and Health Studies, University of Regina, Regina, SK, S4S0A2, Canada. 6. School of Nutrition and Dietetics, Acadia University, Wolfville, Nova Scotia, Canada. 7. Taekwondo National team, Taekwondo federation, Tehran, Iran. 8. Department of Sport Physiology, Boroujerd Branch, Islamic Azad University, Boroujerd, Iran.
Abstract
BACKGROUND:Creatine (CR) and sodium bicarbonate (SB) alone improve anaerobic performance. However, the ergogenic effects of CR and SB co-ingestion on taekwondoanaerobic performance remains unknown. METHODS:Forty 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. RESULTS:PP 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). CONCLUSION: Short-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.
RCT Entities:
BACKGROUND:Creatine (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. METHODS: Forty 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. RESULTS: PP 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). CONCLUSION: Short-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.
Authors: Beate Pfeiffer; Trent Stellingwerff; Adrian B Hodgson; Rebecca Randell; Klaus Pöttgen; Peter Res; Asker E Jeukendrup Journal: Med Sci Sports Exerc Date: 2012-02 Impact factor: 5.411
Authors: Rafael Manjarrez-Montes de Oca; Fernando Farfán-González; Socorro Camarillo-Romero; Patricia Tlatempa-Sotelo; Carlos Francisco-Argüelles; Alexander Kormanowski; Javier González-Gallego; Ildefonso Alvear-Ordenes Journal: Nutr Hosp Date: 2013 Mar-Apr Impact factor: 1.057