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Hypothalamic function in amenorrheic runners.

G Dixon, P Eurman, B E Stern

    Fertility and Sterility
    |September 1, 1984
    PubMed
    Summary
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    This study found that amenorrheic runners maintain normal temperature regulation and that endogenous opiates do not appear to cause exercise-associated amenorrhea. Hypothalamic function remains intact in these athletes.

    Area of Science:

    • Exercise Physiology
    • Neuroendocrinology
    • Reproductive Endocrinology

    Background:

    • Exercise-associated amenorrhea is common in female athletes.
    • The role of endogenous opioids and hypothalamic function in this condition is not fully understood.

    Purpose of the Study:

    • To investigate temperature regulation in amenorrheic runners.
    • To examine the gonadotropin response to an opioid antagonist in amenorrheic runners.

    Main Methods:

    • Oral temperature was continuously measured in cold and hot environments.
    • Subjects included amenorrheic runners, eumenorrheic runners, and controls.
    • Luteinizing hormone and follicle-stimulating hormone levels were measured after naloxone infusion.

    Main Results:

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    • No significant differences in temperature change rates were observed among the groups.
    • Naloxone administration did not significantly alter gonadotropin levels in amenorrheic runners.

    Conclusions:

    • Endogenous opiates do not seem to play a direct role in exercise-associated amenorrhea.
    • Temperature regulatory centers in the hypothalamus appear intact in amenorrheic runners.
    • Further research on hypothalamic function is warranted.