Effects of sodium bicarbonate ingestion on prolonged running performance and recovery in trained runners
Open accessAbstract
Background: While the effects of sodium bicarbonate on buffering capacity have been repeatedly examined on short-term and high-intensity exercise performance, studies on prolonged endurance performances such as running are scarce. Thus, the purpose of this study was to investigate the effect of NaHCO? (0.3 g/kgBW) ingestion 60-minutes prior to the prolonged running testing and recovery in trained runners.Methods: A total of 10 trained male runners (age: 20.70±1.10 years; weight: 61.30±6.20 kg; height: 166.10±3.70 cm; VO2max 58.43±5.62 mL/kg/min) were recruited in this study. Subjects undertook 1 preliminary testing and 2 experimental trials: Sodium Bicarbonate (SB) and Placebo (PLA) trials, which consisted of: (i) a 60-minutes Prolonged Exercise Testing (PET) (30-minutes of constant speed run at 65 % of VO2max followed by a self-selected speed of 30-minutes maximum distance run) and (ii) 30-minutes of the recovery period in randomized order. Data were analyzed using SPSS version 23 for Windows.Results: Subjects ran further during the SB trial than the PLA trial (5,233.60±524.70 m vs. 5,021.40±440.10 m; p=0.012) associated with a greater blood lactate level (5.66±1.09 mmol/L vs. 3.68±0.71 mmol/L). Ingestion of SB drinks significantly increased urine pH during PET and recovery period (p<0.01). During post-recovery, a greater decrease in blood lactate level was found in the SB trial (2.53±0.91 mmol/L; 55%) as compared to the PLA trial (2.17±0.50 mmol/L; 41%) (p<0.01).Conclusion: The ingestion of NaHCO?(0.30 g/kgBW) 60-minutes prior to the PET improved prolonged running performance associated with a faster lactate removal rate during the 30-minutes recovery period.
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In two of the six studies reporting no differences, mean values for abdominal or stomach discomfort were numerically higher with sodium bicarbonate than with non-sodium-bicarbonate conditions, albeit non-significantly.
“in two others, mean values for abdominal or stomach discomfort were numerically higher with sodium bicarbonate than with non‐sodium‐bicarbonate conditions, albeit non‐significantly”
From Gastrointestinal Symptoms Associated With Sodium Bicarbonate Supplementation Protocols: A Systematic Review (2026) · cites this paper as Shing et al. 2021
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- Authors
- Shing, L. K., Yin, L. H., Yong, G. Y., & Hoe, W. E.
- Affiliations
- Tunku Abdul Rahman University of Management and Technology (MY)
- Corresponding author
- Shing, Lew Ka
- Yin, Ler Hui
- Yong, Gee Yong
- Hoe, Wee Eng
- Venue
- Bali Medical Journal
- Publisher
- DiscoverSys, Inc.
- Published
- 2021-12-14
- Volume
- 10
- Issue
- 3
- Pages
- 964-969
- ISSN
- 2089-1180 (ISSN-L)
- 2302-2914
- OpenAlex
- W4213267687
- Cited by
- 2
- References
- 21
- Citations by year
- 2026: 1 · 2025: 1
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Licence
- cc-by-nc-nd
- Locations
- Bali Medical Journal (publishedVersion, cc-by-nc-nd)
- Topics
- Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
- Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
- Keywords
- sodium bicarbonate ingestion, endurance running, recovery, blood lactate, urine pH, trained runners, buffering capacity, placebo-controlled
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