The effect of ingestion an electrolyte-sugar drink on recovery of dehydration

Iwanaga K, Koba T, Tominaga H
The Journal of the Kurume Medical Association 1986; 49: 333-339

The purpose of this study was to investigate whether the consumption of an ion supply drink is effective for improving the recovery of the plasma volume following exercise-induced dehydration.

A randomized cross-over intervention trial was performed in nine healthy male subjects who were asked to consume an ion supply drink, water or not to consume any fluid. The subjects were asked to perform a bicycle exercise in a hot environment with an ambient temperature of 45℃ and a relative humidity of 50% to produce dehydration of 4% of the body mass. During a four-hour recovery period, the subjects were asked to consume the test beverage in an amount equal to their body mass loss 13 separate times every 15 minutes, and their blood properties were measured over time.

When the ion supply drink was consumed, the recovery of the plasma volume which had decreased due to exercise-induced dehydration recovered significantly more quickly during recovery period namely at 1.5 and 2.5 hours compared to water and at 1.5, 2.5, 4 hours for those who did not consume anything.

The ion supply drink intake contributed to the rapid recovery of the plasma volume following exercise-induced dehydration, thus suggesting that the ion supply drink is useful for ameliorating the body fluid loss after sweating during exercise.
Change in plasma volume during the experimental period

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