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Rehydration after exercise in the heat: a comparison of 4 commonly used drinks.

Abstract

To determine the effectiveness of 3 commonly used beverages in restoring fluid and electrolyte balance, 8 volunteers dehydrated by 1.94% +/- 0.17% of body mass by intermittent exercise in the heat, then ingested a carbohydrate-electrolyte solution (Gatorade), carbonated water/apple-juice mixture (Apfelschorle), and San Benedetto mineral water in a volume equal to 150% body-mass loss. These drinks are all are perceived to be effective rehydration solutions, and their effectiveness was compared with the rehydration effectiveness of Evian mineral water, which is not perceived in this way by athletes. Four hours after rehydration, the subjects were in a significantly lower hydration status than the pretrial situation on trials with Apfelschorle (-365 +/- 319 mL, P = 0.030), Evian (-529 +/- 319 mL, P < 0.0005), and San Benedetto (-401 +/- 353 mL, P = 0.016) but were in the same hydration status as before the dehydrating exercise on Gatorade (-201 +/- 388 mL, P = 0.549). Sodium balance was negative on all trials throughout the study; only with Apfelschorle did subjects remain in positive potassium balance. In this scenario, recovery of fluid balance can only be achieved when significant, albeit insufficient, quantities of sodium are ingested after exercise. There is a limited range of commercially available products that have a composition sufficient to achieve this, even though the public thinks that some of the traditional drinks are effective for this purpose.

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  • Authors+Show Affiliations

    ,

    Sport and Exercise Sciences Faculty, Loughborough University, UK.

    , , ,

    Source

    MeSH

    Adult
    Area Under Curve
    Beverages
    Carbohydrates
    Cross-Over Studies
    Dehydration
    Electrolytes
    Female
    Fluid Therapy
    Hot Temperature
    Humans
    Male
    Osmolar Concentration
    Physical Exertion
    Plasma Volume
    Potassium
    Rehydration Solutions
    Sodium
    Water
    Water-Electrolyte Balance

    Pub Type(s)

    Journal Article
    Randomized Controlled Trial
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    17693686

    Citation

    Shirreffs, Susan M., et al. "Rehydration After Exercise in the Heat: a Comparison of 4 Commonly Used Drinks." International Journal of Sport Nutrition and Exercise Metabolism, vol. 17, no. 3, 2007, pp. 244-58.
    Shirreffs SM, Aragon-Vargas LF, Keil M, et al. Rehydration after exercise in the heat: a comparison of 4 commonly used drinks. Int J Sport Nutr Exerc Metab. 2007;17(3):244-58.
    Shirreffs, S. M., Aragon-Vargas, L. F., Keil, M., Love, T. D., & Phillips, S. (2007). Rehydration after exercise in the heat: a comparison of 4 commonly used drinks. International Journal of Sport Nutrition and Exercise Metabolism, 17(3), pp. 244-58.
    Shirreffs SM, et al. Rehydration After Exercise in the Heat: a Comparison of 4 Commonly Used Drinks. Int J Sport Nutr Exerc Metab. 2007;17(3):244-58. PubMed PMID: 17693686.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Rehydration after exercise in the heat: a comparison of 4 commonly used drinks. AU - Shirreffs,Susan M, AU - Aragon-Vargas,Luis F, AU - Keil,Mhairi, AU - Love,Thomas D, AU - Phillips,Sian, PY - 2007/8/19/pubmed PY - 2007/9/26/medline PY - 2007/8/19/entrez SP - 244 EP - 58 JF - International journal of sport nutrition and exercise metabolism JO - Int J Sport Nutr Exerc Metab VL - 17 IS - 3 N2 - To determine the effectiveness of 3 commonly used beverages in restoring fluid and electrolyte balance, 8 volunteers dehydrated by 1.94% +/- 0.17% of body mass by intermittent exercise in the heat, then ingested a carbohydrate-electrolyte solution (Gatorade), carbonated water/apple-juice mixture (Apfelschorle), and San Benedetto mineral water in a volume equal to 150% body-mass loss. These drinks are all are perceived to be effective rehydration solutions, and their effectiveness was compared with the rehydration effectiveness of Evian mineral water, which is not perceived in this way by athletes. Four hours after rehydration, the subjects were in a significantly lower hydration status than the pretrial situation on trials with Apfelschorle (-365 +/- 319 mL, P = 0.030), Evian (-529 +/- 319 mL, P < 0.0005), and San Benedetto (-401 +/- 353 mL, P = 0.016) but were in the same hydration status as before the dehydrating exercise on Gatorade (-201 +/- 388 mL, P = 0.549). Sodium balance was negative on all trials throughout the study; only with Apfelschorle did subjects remain in positive potassium balance. In this scenario, recovery of fluid balance can only be achieved when significant, albeit insufficient, quantities of sodium are ingested after exercise. There is a limited range of commercially available products that have a composition sufficient to achieve this, even though the public thinks that some of the traditional drinks are effective for this purpose. SN - 1526-484X UR - https://www.unboundmedicine.com/medline/citation/17693686/Rehydration_after_exercise_in_the_heat:_a_comparison_of_4_commonly_used_drinks_ L2 - https://medlineplus.gov/dehydration.html DB - PRIME DP - Unbound Medicine ER -