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[Effect of exercise on plasma cyclic AMP].

A Ito

    Nihon Seirigaku Zasshi. Journal of the Physiological Society of Japan
    |January 1, 1984
    PubMed
    Summary

    Physical exercise intensity and duration significantly impact plasma cyclic AMP (cAMP) levels, influencing key hormones like thyroxine and growth hormone. Carbohydrate intake can modulate these exercise-induced cAMP responses.

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    Area of Science:

    • Exercise Physiology
    • Endocrinology
    • Biochemistry

    Context:

    • Understanding the physiological responses to physical exertion is crucial for sports science and health.
    • Cyclic AMP (cAMP) is a vital second messenger involved in numerous cellular processes, including hormonal regulation.

    Purpose:

    • To investigate the correlation between plasma cyclic AMP (cAMP) levels and the concentrations of various hormones during and after physical exercise.
    • To elucidate the influence of exercise intensity, duration, and carbohydrate intake on plasma cAMP and hormonal profiles.

    Summary:

    • Plasma cAMP levels increase with exercise intensity and duration, correlating with elevated thyroxine, growth hormone, adrenaline, and noradrenaline.
    • At rest, plasma cAMP levels were 23.1 p mole/ml, decreasing after glucose loading.
    • Prolonged exercise (over 1.5 hours) led to a rise in plasma glucagon, while carbohydrate intake reduced plasma cAMP levels during exercise.

    Impact:

    • These findings suggest that plasma cAMP serves as a key indicator of metabolic and hormonal adjustments during physical activity.
    • The study highlights the complex interplay between exercise, cAMP, and the endocrine system, involving hormones that regulate glycolytic activity and growth.
    • Results provide insights into the physiological mechanisms underlying exercise adaptation and the role of cAMP in mediating hormonal responses.

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