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Gastric emptying in exercised mice.

K K Grunewald, T J Tucker

    Comparative Biochemistry and Physiology. A, Comparative Physiology
    |January 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Exercise intensity impacts gastric emptying in mice. Moderate treadmill exercise (0.50 mph) accelerated gastric emptying initially, while lower intensity (0.25 mph) showed no significant effect. Larger stomach volumes emptied faster post-exercise.

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    Area of Science:

    • Physiology
    • Exercise Science
    • Gastroenterology

    Background:

    • Gastric emptying is a crucial physiological process influencing nutrient absorption and energy availability.
    • The effects of exercise intensity on gastric emptying dynamics are not fully elucidated.
    • Understanding exercise-induced changes in gastric function is vital for athletes and individuals with gastrointestinal disorders.

    Purpose of the Study:

    • To investigate the influence of different treadmill exercise intensities on gastric emptying rates in male adult mice.
    • To determine the effect of exercise duration on exercise-induced alterations in gastric emptying.
    • To examine the relationship between stomach volume and gastric emptying speed during exercise.

    Main Methods:

    • Male adult mice were fasted for 8-10 hours.

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  • A 1% phenol red marker solution was administered to assess gastric emptying.
  • Mice underwent treadmill exercise at controlled speeds (0.50 mph and 0.25 mph) or remained sedentary.

    • Main Results:

    • Mice exercising at 0.50 mph exhibited significantly faster gastric emptying rates at the 15-minute mark compared to non-exercised controls.
    • No significant differences in gastric emptying were observed at longer exercise durations (beyond 15 minutes) for the 0.50 mph group.
    • Mice exercising at 0.25 mph did not show significant differences in gastric emptying rates across all studied time intervals.
    • A positive correlation was found between larger stomach volumes and faster gastric emptying rates in exercised mice.

    Conclusions:

    • Moderate-intensity treadmill exercise can acutely accelerate gastric emptying in mice, particularly at shorter durations.
    • Lower-intensity exercise may not significantly alter gastric emptying dynamics.
    • Stomach volume is a key determinant of gastric emptying speed, irrespective of exercise status.