The Effects of a Novel Sodium Bicarbonate Ingestion System on Repeated 4 km Cycling Time Trial Performance in Well-Trained Male Cyclists,Sports Medicine

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The Effects of a Novel Sodium Bicarbonate Ingestion System on Repeated 4 km Cycling Time Trial Performance in Well-Trained Male Cyclists
Sports Medicine ( IF 9.3 ) Pub Date : 2024-08-09 , DOI: 10.1007/s40279-024-02083-4
Lewis A Gough ₁ , S Andy Sparks _{2,

3}

Affiliation

Background

A novel sodium bicarbonate (SB) product has come to market named the “Bicarb System” (M-SB; Maurten AB, Gothenburg, Sweden). It claims to minimise gastrointestinal (GI) discomfort whilst still improving exercise performance.

Aim

To investigate the effects of M-SB ingestion on repeated 4 km cycling time trials (TT1 and TT2) in well-trained male cyclists.

Methods

The study recruited ten well-trained cyclists (maximal oxygen uptake (\(\dot{V}{\text{O}}_{2\max }\)): 67 ± 4 ml kg⁻¹ min⁻¹ BM; peak power output (PPO) at \(\dot{V}{\text{O}}_{2\max }\): 423 ± 21 W) to take part in this randomised, crossover and double-blinded study. Following one visit to determine \(\dot{V}{\text{O}}_{2\max }\), participants completed a second visit to identify individual time to peak blood bicarbonate (HCO₃⁻) (ITTP) in a rested state. Visit three was a familiarisation trial mimicking the experimental procedures. Visits four to seven consisted of completing 2 × 4 km cycling TTs separated by 45 min passive recovery, following one of either: 0.3 g kg⁻¹ BM M-SB, 0.21 g kg⁻¹ BM sodium chloride (placebo; PLA) in vegetarian capsules (size 00), or a control trial (CON). Supplements (M-SB or placebo) were ingested pre-exercise at their respective ITTP.

Results

Performance in TT1 was faster in the M-SB condition compared with TT1 in CON (− 5.1 s; p = 0.004) and PLA (− 3.5 s; p < 0.001). In TT2, performance was also significantly faster in the M-SB condition compared with CON (− 4.4 s; p = 0.018) or PLA (− 4.1 s; p = 0.002). Total aggregated GI symptoms were generally low and not significantly different between PLA and the M-SB conditions for a range of symptoms.

Conclusions

The ingestion of M-SB improves repeated 4 km cycling TT performance and the recovery of acid–base balance between bouts, whilst causing minimal GI discomfort.

中文翻译：

新型碳酸氢钠摄入系统对训练有素的男性骑行者重复 4 公里骑行计时赛表现的影响

背景

一种名为“碳酸氢钠系统”（M-SB;Maurten AB，瑞典哥德堡）。它声称可以最大限度地减少胃肠道（GI）不适，同时仍能提高运动表现。

目的

探讨摄入 M-SB 对训练有素的男性骑行者重复 4 公里骑行计时赛（TT1 和 TT2）的影响。

方法

该研究招募了 10 名训练有素的骑行者（最大摄氧量（\（\dot{V}{\text{O}}_{2\max }\））：67 ± 4 ml ^kg-1 ^min-1 BM;峰值功率输出（PPO）在 \（\dot{V}{\text{O}}_{2\max }\）：423 ± 21 W）参加这项随机、交叉和双盲研究。在一次确定 \（\dot{V}{\text{O}}_{2\max }\）的访视之后，参与者完成了第二次访视，以确定在静息状态下达到血碳酸氢盐（HCO₃⁻）（ITTP）峰值的个人时间。第三次访问是模拟实验程序的熟悉试验。第 4 到 7 次访问包括完成 2 × 4 公里的自行车 TT，间隔 45 分钟被动恢复，之后是其中之一：0.3 g ^kg-1 BM M-SB，0.21 g ^kg-1 BM 氯化钠（安慰剂;PLA）在素食胶囊（00 号）或对照试验（CON）中。补充剂（M-SB 或安慰剂）在各自的 ITTP 运动前摄入。

结果

与 CON 中的 TT1 相比，在 M-SB 条件下 TT1 的性能更快（- 5.1 s;p = 0.004）和 PLA （− 3.5 s;p < 0.001）。在 TT2 中，与 CON 相比，M-SB 条件下的性能也明显更快（- 4.4 s;p = 0.018）或 PLA （− 4.1 s;p = 0.002）。总聚集的 GI 症状通常较低，并且在 PLA 和 M-SB 条件之间的一系列症状之间没有显著差异。