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Rehydration with sodium-enriched coconut water after exercise-induced dehydration
I Ismail1, R Singh, R G Sirisinghe
1Sports Science Unit, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan.
The Southeast Asian Journal of Tropical Medicine and Public Health
|September 22, 2007
Summary
Sodium-enriched coconut water (SCW) effectively rehydrates and restores plasma volume after exercise dehydration, matching sports drink performance with improved fluid tolerance. This makes SCW a viable alternative for athletes seeking optimal recovery.
Area of Science:
- Exercise Physiology
- Sports Nutrition
- Hydration Science
Background:
- Exercise-induced dehydration impairs performance and physiological function.
- Effective rehydration strategies are crucial for athletes' recovery and performance.
- Commercial sports drinks are commonly used, but alternatives are being explored.
Purpose of the Study:
- To compare the rehydration effectiveness of plain water, sports drinks, fresh young coconut water, and sodium-enriched young coconut water.
- To assess plasma volume restoration and fluid tolerance with different beverages after dehydration.
- To determine the impact of these beverages on plasma glucose concentrations.
Main Methods:
- A crossover study involving ten healthy males undergoing 90 minutes of exercise to induce 3% body weight loss.
- Randomized administration of plain water, sports drink, fresh young coconut water, or sodium-enriched young coconut water during a 2-hour rehydration period.
- Measurement of rehydration indexes, plasma volume, plasma glucose, and subjective fluid tolerance.
Main Results:
- All beverages resulted in some dehydration after 2 hours, but sports drinks and sodium-enriched coconut water showed significantly better rehydration (68-69%) than plain water (58%).
- Plasma volume was restored to euhydration levels with sports drinks, coconut water, and sodium-enriched coconut water, but not plain water.
- Sodium-enriched coconut water demonstrated comparable sweetness to sports drinks and fresh coconut water but resulted in less nausea and stomach upset.
Conclusions:
- Sodium-enriched young coconut water is as effective as commercial sports drinks for whole-body rehydration after exercise-induced dehydration.
- The improved fluid tolerance of sodium-enriched coconut water makes it a promising alternative for athletes.
- Further research may explore optimal formulations for enhanced athletic recovery.
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