Effects of a carbohydrate-electrolyte beverage on blood viscosity after dehydration in healthy adults

Chang CQ, Chen YB, Chen ZM, Zhang LT
Chinese Medical Journal 2010; 123: 3220-3225

Purpose:
We studied whether an ion supply drink was more effective than water and tea, which is widely consumed in China, for helping subjects recover from elevated blood viscosity due to exercise-induced dehydration.

Methods:
Twelve young healthy male subjects (Chinese college students) were studied in three randomized cross-over intervention trials using an ion supply drink, water or tea. Following cycle ergometer exercise-induced dehydration of 2.2% of their body weight in a warm environment (ambient temperature 34.3℃, relative humidity 63%), the subjects ingested test beverages equal to their body weight loss, then the water balance and properties of the blood were assessed.

Results:
The blood viscosity was significantly lower in the ion supply drink compared to the water and tea at 60 minutes after ingesting the test beverages. The change in plasma volume was significantly different in the ion supply drink compared to the water and tea at 120 minutes after ingesting test beverages. The increase in the plasma volume was significantly attenuated in the tea compared to the ion supply drink and water at 60, 120 and 180 minutes. The fluid retention rate was significantly higher in the ion supply drink in comparison to the water and tea at 60, 120 and 180 minutes after ingesting the test beverages.

Conclusion:
Ingesting the ion supply drink is more useful than ingesting water and tea for normalizing the blood viscosity following exercise-induced dehydration.

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