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Updated: Mar 21, 2026

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Exercise Induced Alterations in Rat Monocyte Number, Morphology, and Function.

Marcia G Guereschi1, Jonato Prestes2, Felipe F Donatto1

  • 1Health Sciences Faculty, Methodist University of Piracicaba, São Paulo, BRAZIL.

International Journal of Exercise Science
|May 17, 2016
PubMed
Summary
This summary is machine-generated.

Short exercise periods, varying in intensity, significantly alter monocytes and macrophages in rats. These changes suggest exercise can enhance immune cell function and potentially improve health and longevity.

Keywords:
Exercisecells morphometryinnate immune systemphagocytosis

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Area of Science:

  • Immunology
  • Exercise Physiology
  • Cell Biology

Background:

  • Monocytes and macrophages are crucial immune cells involved in host defense.
  • Acute exercise is known to modulate immune cell function, but the specific effects of short-duration, varied-intensity exercise on these cells require further investigation.

Purpose of the Study:

  • To investigate the histophysiological changes in monocytes and macrophages following short-term exercise interventions of varying intensities.
  • To determine the impact of exercise intensity and duration on monocyte quantity, morphology, and macrophage quantity and phagocytic activity.

Main Methods:

  • Male Wistar rats were subjected to swimming exercise at low or moderate intensity (with a 5% body weight load) for 5, 10, or 15 minutes.
  • Blood monocytes were analyzed for quantity and morphology.
  • Peritoneal macrophages were assessed for quantity and phagocytic capacity.
  • Statistical analysis was performed using ANOVA and Tukey's post hoc test.

Main Results:

  • Exercise increased monocyte levels and cellular/nuclear area in several groups compared to controls.
  • Peritoneal macrophage quantity increased in some exercised groups, with a decrease observed in the 5-minute moderate-intensity group.
  • Macrophage phagocytic capacity was enhanced in low-intensity exercise groups and the 10-minute moderate-intensity group.

Conclusions:

  • Short-duration exercise, modulated by intensity, significantly impacts monocyte and macrophage populations and functions.
  • These acute immune responses suggest a potential protective effect against illness and a role in promoting health and longevity.