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Proteinuria in the exercising dog.

J B Epstein, E J Zambraski

    Medicine and Science in Sports
    |January 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Heavy exercise can cause transient proteinuria in dogs, even when renal blood flow remains constant. This suggests that reduced renal blood flow is not the sole cause of exercise-induced proteinuria.

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    Area of Science:

    • Nephrology
    • Exercise Physiology
    • Veterinary Medicine

    Background:

    • Exercise proteinuria is a temporary condition observed in humans after strenuous physical activity.
    • It is widely believed that a decrease in renal blood flow (RBF) during exercise contributes to exercise proteinuria in humans.

    Purpose of the Study:

    • To investigate the occurrence of exercise proteinuria in dogs.
    • To determine if exercise proteinuria can happen independently of changes in renal blood flow (RBF).

    Main Methods:

    • Four female mongrel dogs were surgically fitted with chronic bladder cannulas.
    • Urine samples were collected from both kidneys before, during, and after 30 minutes of intense treadmill exercise (5 mph, 15% grade).
    • Urine protein concentration was measured using the biuret method.

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    Main Results:

    • Urine protein concentration significantly increased by 47% during exercise compared to resting levels (P < .01).
    • Urine flow rate decreased during exercise, but protein excretion showed only a small, non-significant decline.
    • Post-exercise urine protein concentration was significantly elevated compared to resting values (P < .01).

    Conclusions:

    • Exercise proteinuria can occur in dogs even when renal blood flow does not change significantly.
    • These findings challenge the notion that reduced renal blood flow is the primary driver of exercise-induced proteinuria.