Sheffield Hallam University, Sport & Physical Activity Research Centre, Health Research Institute, Sheffield, UK.
Birmingham City University, Human Performance and Health Research Group, Centre for Life & Sport Sciences, Birmingham, UK.
J Int Soc Sports Nutr. 2023 Dec;20(1):2216678. doi: 10.1080/15502783.2023.2216678.
This study examined the effects of oral and topical (PR Lotion; Momentous) sodium bicarbonate (NaHCO) during a battery of team sport-specific exercise tests.
In a block randomized, crossover, double-blind, placebo-controlled design, 14 recreationally trained male team sport athletes performed a familiarization visit and three experimental trials receiving: (i) 0.3 g·kg body mass (BM) NaHCO in capsules + placebo lotion (SB-ORAL), (ii) placebo capsules +0.9036 g·kg BM PR Lotion (SB-LOTION), or (iii) placebo capsules + placebo lotion (PLA). Supplements were given ~120 min prior to the team sport-specific exercise tests: countermovement jumps (CMJ), 8 × 25 m repeated sprints and Yo-Yo Intermittent Recovery Level 2 (Yo-Yo IR2). Blood acid-base balance (pH, bicarbonate) and electrolytes (sodium, potassium) were measured throughout. Rating of perceived exertion (RPE) was recorded after each sprint and post-Yo-Yo IR2.
Distance covered during the Yo-Yo IR2 was 21% greater for SB-ORAL compared with PLA (+94 m; = 0.009, = 0.64) whereas performance was only 7% greater for SB-LOTION compared with PLA (480 ± 122 vs. 449 ± 110 m; = 0.084). Total completion time for the 8 × 25 m repeated sprint test was 1.9% faster for SB-ORAL compared with PLA (-0.61 s; = 0.020, = 0.38) and 2.0% faster for SB-LOTION compared with PLA (-0.64 s; = 0.036, = 0.34). CMJ performance was similar between treatments ( > 0.05). Blood acid-base balance and electrolytes were significantly improved for SB-ORAL compared with PLA, but no differences were observed for SB-LOTION. Compared to PLA, RPE was lower for SB-LOTION after the fifth ( = 0.036), sixth ( = 0.012), and eighth ( = 0.040) sprints and for SB-ORAL after the sixth ( = 0.039) sprint.
Oral NaHCO improved 8 × 25 m repeated sprint (2%) and Yo-Yo IR2 performance (21%). Similar improvements in repeated sprint times were observed for topical NaHCO (2%), but no significant benefits were reported for Yo-Yo IR2 distance or blood acid-base balance compared to PLA. These findings suggest that PR Lotion might not be an effective delivery system for transporting NaHCO molecules across the skin and into systematic circulation, therefore further research is needed to elucidate the physiological mechanisms responsible for the ergogenic effects of PR Lotion.
本研究考察了口服和局部（PR 乳液；Momentous）碳酸氢钠（NaHCO3）在一系列团队运动专项运动测试中的作用。
在一项随机、交叉、双盲、安慰剂对照设计中，14 名接受过团队运动训练的男性运动员进行了一次熟悉度访问和三次实验性试验，分别接受以下三种处理：（i）胶囊中的 0.3g·kg 体重（BM）碳酸氢钠+安慰剂乳液（SB-ORAL），（ii）安慰剂胶囊+0.9036g·kg BM PR 乳液（SB-LOTION），或（iii）安慰剂胶囊+安慰剂乳液（PLA）。补充剂在团队运动专项运动测试前约 120 分钟给予：（1）纵跳，（2）8×25m 重复冲刺和 Yo-Yo 间歇性恢复水平 2（Yo-Yo IR2）。整个过程中测量血液酸碱平衡（pH 值、碳酸氢盐）和电解质（钠、钾）。每次冲刺后和 Yo-Yo IR2 后记录感觉用力程度（RPE）。
与 PLA 相比，SB-ORAL 组的 Yo-Yo IR2 距离增加了 21%（+94m； = 0.009， = 0.64），而 SB-LOTION 组的 Yo-Yo IR2 距离仅增加了 7%（480 ± 122 比 449 ± 110m； = 0.084）。与 PLA 相比，SB-ORAL 组的 8×25m 重复冲刺测试总完成时间快了 1.9%（-0.61s； = 0.020， = 0.38），SB-LOTION 组快了 2.0%（-0.64s； = 0.036， = 0.34）。与其他处理组相比，CMJ 表现无显著差异（ > 0.05）。与 PLA 相比，SB-ORAL 组的血液酸碱平衡和电解质明显改善，但 SB-LOTION 组无差异。与 PLA 相比，SB-LOTION 组在第五次（ = 0.036）、第六次（ = 0.012）和第八次（ = 0.040）冲刺后，以及 SB-ORAL 组在第六次（ = 0.039）冲刺后，感觉用力程度较低。
口服碳酸氢钠（NaHCO3）可提高 8×25m 重复冲刺（2%）和 Yo-Yo IR2 表现（21%）。局部碳酸氢钠（NaHCO3）对重复冲刺时间的改善相似（2%），但与 PLA 相比，Yo-Yo IR2 距离或血液酸碱平衡无显著益处。这些发现表明，PR 乳液可能不是一种有效的输送系统，无法将碳酸氢钠分子输送穿过皮肤并进入系统循环，因此需要进一步研究阐明 PR 乳液的运动表现增强作用的生理机制。
