Faculty of Physical Education and Sport Sciences, Department of Exercise Physiology, Karaj Branch, Islamic Azad University, Karaj, Iran.
Faculty of Education, Department of Physical Education, Brandon University, Brandon, MB, R7A6A9, Canada.
J Int Soc Sports Nutr. 2021 Jan 21;18(1):10. doi: 10.1186/s12970-021-00407-7.
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.
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·d 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.
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∙kg) compared to CR (Absolute Δ: 0.43 ± 0.33 W∙kg; P < 0.001) and SB (Absolute Δ: 0.73 ± 0.24 W∙kg; 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).
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.
肌酸（CR）和碳酸氢钠（SB）单独使用可以提高无氧表现。然而，CR 和 SB 共同摄入对跆拳道无氧表现的促进作用尚不清楚。
40 名经过训练的跆拳道运动员（21±1 岁；180.5±7.3 厘米；72.7±8.6 公斤）被随机分为：（i）CR 和 SB（CR+SB；20gCR+0.5g·kg·d SB）、（ii）CR、（iii）SB、（iv）安慰剂（PLA）或（v）对照组（CON），进行 5 天的补充。补充前后，参与者完成 3 轮跆拳道无氧间歇性踢腿测试（TAIKT），以确定峰值功率（PP）、平均功率（MP）和疲劳指数（FI）的变化。在 TAIKT 之前、之后立即和之后 3 分钟测量血乳酸（BL）。
在 CR+SB、CR 和 SB 摄入后，PP 和 MP 随时间增加（P<0.05），而 PLA 和 CON 组没有变化。与 CR（绝对 Δ：0.43±0.33 W·kg；P<0.001）和 SB（绝对 Δ：0.73±0.24 W·kg；P=0.03）相比，CR+SB 随时间的 MP 增加更大。FI 没有明显的时间和条件影响（P>0.05）。BL 在所有组中均在运动后增加；然而，与 CR、PLA 和 CON 相比，CR+SB 和 SB 运动后 BL 较低（P<0.05）。
短期 CR 和 SB 单独使用可提高跆拳道运动员的 TAIKT 表现。与 CR 和 SB 单独使用相比，CR 和 SB 共同摄入可提高 MP，而 PP 也有类似的改善。
