Wang Yongliang, Wang Yanyan, Qian Kun
Police Skills and Tactics Training Department, Criminal Investigation Police University of China, Shenyang, Liaoning, China.
College of Sports Science, Shenyang Normal University, Shenyang, Liaoning, China.
J Sports Sci Med. 2025 Jun 1;24(2):258-268. doi: 10.52082/jssm.2025.258. eCollection 2025 Jun.
This study examined the effects of L-citrulline (L-CIT) and sodium bicarbonate (Sb) supplementation during short sprint interval training (SSIT), both individually and combined, over a 28-day period, to assess the impact on the physical performance and hormonal adaptations of basketball players. Forty young (age = 21.5 ± 1.7 years) male basketball players were randomly assigned into five groups of eight subjects including either L-CIT (6 g daily), Sb (0.3 g·kg of Sb daily), L-CIT+Sb, placebo (PL), and or an active control group (CON). The training groups engaged in SSIT sessions, consisting of three sets of ten repetitions of five-second all-out sprints, three times per week over four weeks. A series of physical performance tests including countermovement vertical jump, a 20-m linear sprint, Illinois change of direction speed, Wingate anaerobic power, and an incremental exercise test were conducted before and after the training period. In addition, blood samples were obtained to analyze resting testosterone and cortisol levels before and after the training period. Significant improvements in physical performance were observed across all training groups after the 4-week intervention (p < 0.05). Notably, the groups receiving supplements exhibited more pronounced improvements in the physical performance tests (p < 0.01) in comparison to the PL group, indicating superior adaptations. In addition, no significant (p > 0.05) changes were seen in testosterone, but the supplement groups showed lower cortisol levels than other groups following the 4-week intervention. There were no significant differences in physical performance adaptations among the supplement groups. The study reveals that short-term supplementation of L-citrulline and sodium bicarbonate in the capsule form effectively enhance physical performance of basketball players in comparison to a placebo.
本研究考察了在28天的短距离间歇冲刺训练（SSIT）期间，单独及联合补充L-瓜氨酸（L-CIT）和碳酸氢钠（Sb）对篮球运动员身体机能和激素适应性的影响。40名年轻（年龄=21.5±1.7岁）男性篮球运动员被随机分为五组，每组8人，分别为L-CIT组（每日6克）、Sb组（每日0.3克/千克Sb）、L-CIT+Sb组、安慰剂（PL）组和一个积极对照组（CON）。训练组进行SSIT训练，包括三组，每组十次五秒全力冲刺，每周三次，共四周。在训练期前后进行了一系列身体机能测试，包括反向纵跳、20米直线冲刺、伊利诺伊变向速度、温盖特无氧功率和递增运动测试。此外，采集血样分析训练期前后的静息睾酮和皮质醇水平。4周干预后，所有训练组的身体机能均有显著改善（p<0.05）。值得注意的是，与PL组相比，接受补充剂的组在身体机能测试中表现出更明显的改善（p<0.01），表明适应性更好。此外，睾酮水平无显著（p>0.05）变化，但4周干预后，补充剂组的皮质醇水平低于其他组。补充剂组之间在身体机能适应性方面无显著差异。该研究表明，与安慰剂相比，短期以胶囊形式补充L-瓜氨酸和碳酸氢钠可有效提高篮球运动员的身体机能。
