The C.A.M. Report
Complementary and Alternative Medicine: Fair, Balanced, and to the Point
  • About this web log

    This blog is intended as an objective and dispassionate source of information on the latest CAM research. Since my background is in pharmacy and allopathic medicine, I view all CAM as advancing through the development pipeline to eventually become integrated into mainstream medical practice. Some will succeed while others fail. But all are treated fairly here.

  • About the author

    John Russo, Jr., PharmD, is president of The MedCom Resource, Inc. Previously, he was senior vice president of medical communications at www.Vicus.com, a complementary and alternative medicine website.

  • Common sense considerations

    The material on this weblog is for informational purposes. It is not medical advice or counsel. Be smart, consult your health professional before using CAM.

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    Defining the effects of caffeine in exercising adults

    It’s commonly recommended that exercising adults and athletes avoid caffeine because it’s a diuretic, and might exacerbate dehydration and hyperthermia.

    Researchers from the University of Connecticut reviewed the literature.

    For reference, an 8-ounce cup of drip-brewed coffee typically contains 85 mg of caffeine. A can of Coke has about 31 mg.

    • Consuming a moderate level of caffeine (240-642 mg) results in a mild increase of urine production.
    • There’s no evidence that less than 456 mg of caffeine leads to chronic dehydration or has a negative effect on exercise performance, temperature regulation, or the circulation in a hot environment.
    • Caffeinated fluids contribute to the daily human water requirement similar to pure water.
    • An affluent Western diet provides sodium and potassium in amounts that exceed these losses.
    • There’s little or no evidence that caffeine increases heat storage during exercise or that caffeine has a negative effect on exercise performance in a hot environment.
    • Little is known about caffeine doses greater than 600 mg consumed at one time and the effect of different modes of caffeine delivery (ie, capsules, tablets, coffee, tea, soft drinks, sport drinks, and solid food).

    8/6/07 19:37 JR

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