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Exercise and renal function.

J R Poortmans

    Sports Medicine (Auckland, N.Z.)
    |March 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Intense exercise significantly reduces kidney blood flow and alters electrolyte and protein excretion. Proper hydration is crucial for mitigating exercise-induced renal changes and protein abnormalities.

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    Area of Science:

    • Nephrology
    • Exercise Physiology
    • Sports Medicine

    Background:

    • Exercise profoundly impacts renal hemodynamics and excretory functions.
    • Renal plasma flow can decrease significantly with exercise intensity.
    • Sympathetic nervous activity and catecholamines play a role in these changes.

    Purpose of the Study:

    • To investigate the effects of exercise on renal hemodynamics.
    • To analyze changes in electrolyte and protein excretion during and after exercise.
    • To understand the influence of hydration on exercise-induced renal alterations.

    Main Methods:

    • Monitoring renal plasma flow and glomerular filtration rate during exercise.
    • Analyzing urine composition for electrolytes, proteins, erythrocytes, and leucocytes.

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  • Assessing the impact of varying exercise intensities and hydration levels.

    • Main Results:

    • Renal blood flow reduction is intensity-dependent, potentially falling to 25% of resting values.
    • Glomerular filtration rate decreases less than renal blood flow; hydration influences this.
    • Postexercise proteinuria, a mixed glomerular-tubular type, is common and related to exercise intensity.

    Conclusions:

    • Exercise causes significant, intensity-dependent changes in renal function and excretion.
    • Hydration status is critical for managing exercise-induced renal abnormalities.
    • Postexercise proteinuria and other urinary changes are transient but common phenomena.