碳酸氢钠摄入对大学生高强度间歇训练 6 周后无氧能力的影响。
Effect of sodium bicarbonate ingestion during 6 weeks of HIIT on anaerobic performance of college students.
机构信息
College of Kinesiology, Beijing Sport University, Beijing, BJ, China.
Department of Nutrition, Georgia State University, Atlanta, GA, USA.
出版信息
J Int Soc Sports Nutr. 2019 Apr 15;16(1):18. doi: 10.1186/s12970-019-0285-8.
BACKGROUND
Past studies have found that sodium bicarbonate ingestion prior to exercise has a performance-enhancing effect on high-intensity exercise. The aim of this study was to investigate the effects of continuous sodium bicarbonate (NaHCO) supplementation on anaerobic performance during six weeks of high-intensity interval training (HIIT).
METHODS
Twenty healthy college-age male participants were randomly assigned to either the HCO group (SB) or the placebo group (PL), with 10 subjects in each group. Both groups completed 6 weeks (3 days/week) of HIIT with the SB ingesting an orange-flavored solution containing 15 g xylitol and 0.2 g HCO/kg body mass during each training day, and PL ingesting a similar beverage that was HCO-free. This study separated 6 weeks of training into two stages with different training intensities, with the first 3 weeks at a lower intensity than the second 3 weeks. Blood samples to measure serum HCO were obtained 5 min before and 30 min after the following HIIT training sessions: Week 1, training session 1; week 3, training session 3; week 6, training session 3. Three 30s Wingate tests (WAnT) were conducted before, in the middle, and after the training and the supplementation interventions, with peak power, mean power, and fatigue index obtained during WAnT, and blood lactate and heart rate obtained after WAnT.
RESULTS
Our findings indicate the following: 1) Serum HCO level of SB was significantly higher than PL (p < 0.05) both before and after each HIIT; 2) Relative peak power in WAnT was significantly higher in the SB group after 6 weeks (p < 0.01); 3) Lactate clearance rate and the lactate clearance velocity after 10 min of WAnT were both significantly higher in SB in the post-test (p < 0.01); 4) Heart rate recovery rate at 10 min after WAnT in both SB and PL after 6 weeks were significantly improved (p < 0.01 and p < 0.05, respectively), resulting in no difference between groups on these measures.
CONCLUSIONS
These data suggest that supplementation of HCOat the level of 0.2 g/kg body mass before HIIT training enhances the effect of HIIT on anaerobic performance, and improves the blood lactate clearance rate and the blood lactate clearance velocity following anaerobic exercise.
背景
过去的研究发现，运动前摄入碳酸氢钠可提高高强度运动的表现。本研究旨在探讨连续补充碳酸氢钠（NaHCO）对高强度间歇训练（HIIT）六周期间无氧性能的影响。
方法
20 名健康的大学生男性参与者被随机分配到碳酸氢钠组（HCO）或安慰剂组（PL），每组 10 名。两组均进行 6 周（每周 3 天）的 HIIT，HCO 组在每次训练日摄入含有 15 克木糖醇和 0.2 克 HCO 的橙汁味溶液，PL 组摄入不含 HCO 的类似饮料。本研究将 6 周的训练分为两个阶段，强度不同，前 3 周的强度低于后 3 周。在以下 HIIT 训练课程之前和之后 5 分钟内采集血清 HCO 样本：第 1 周，第 1 次训练；第 3 周，第 3 次训练；第 6 周，第 3 次训练。在训练和补充干预之前、中间和之后进行了 3 次 30 秒的 Wingate 测试（WAnT），获得了 WAnT 期间的峰值功率、平均功率和疲劳指数，以及 WAnT 后的血乳酸和心率。
结果
我们的研究结果表明：1）HCO 组的血清 HCO 水平在每次 HIIT 前后均明显高于 PL（p<0.05）；2）6 周后，WAnT 中的相对峰值功率在 HCO 组中明显更高（p<0.01）；3）WAnT 后 10 分钟的乳酸清除率和乳酸清除速度在 HCO 组中均明显更高（p<0.01）；4）WAnT 后 10 分钟的心率恢复率在 HCO 组和 PL 组均明显提高（p<0.01 和 p<0.05），两组之间无差异。
结论
这些数据表明，HIIT 训练前以 0.2g/kg 体重补充 HCO 可增强 HIIT 对无氧性能的影响，并提高无氧运动后的血乳酸清除率和血乳酸清除速度。
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