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Induced alkalosis and caffeine supplementation: effects on 2,000-m rowing performance
Amelia J Carr1, Christopher J Gore, Brian Dawson
1School of Sport Science, Exercise and Health, University of Western Australia, Perth, Australia.
Summary
Caffeine significantly improved 2,000-m rowing performance by approximately 2%. Combining caffeine with sodium bicarbonate did not enhance performance, potentially due to gastrointestinal issues.
Area of Science:
- Sports Science
- Exercise Physiology
- Nutritional Supplementation
Background:
- Investigating ergogenic aids is crucial for optimizing athletic performance.
- Understanding the physiological effects of caffeine and sodium bicarbonate is key for athletes.
Purpose of the Study:
- To evaluate the impact of caffeine, sodium bicarbonate, and their combination on 2,000-m rowing performance.
- To assess the effects on physiological markers like blood pH, bicarbonate, lactate, and perceived exertion.
Main Methods:
- A double-blind, crossover study involving 8 well-trained rowers.
- Participants ingested caffeine (6 mg/kg), sodium bicarbonate (0.3 g/kg BM), both, or a placebo.
- Performance and physiological variables were measured during 2,000-m rowing ergometer tests.
Main Results:
- Caffeine supplementation substantially improved 2,000-m mean power output compared to placebo.
- Sodium bicarbonate and the combination increased pretest blood bicarbonate and pH levels.
- Performance effects of the caffeine-bicarbonate combination were unclear, possibly due to side effects.
Conclusions:
- Caffeine supplementation can enhance rowing performance by approximately 2%.
- Combining caffeine with sodium bicarbonate may not yield performance benefits due to potential gastrointestinal symptoms.
- Further research is needed on ingestion strategies to mitigate side effects when combining these supplements.
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