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Related Experiment Videos

Exercise training and energy restriction decrease neutrophil phagocytic activity in judoists.

K Kowatari1, T Umeda, T Shimoyama

  • 1Department of Hygiene, Hirosaki University School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori 036-8562, Japan. kenji@cc.hirosaki-u.ac.jp

Medicine and Science in Sports and Exercise
|April 3, 2001
PubMed
Summary

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Weight reduction through exercise and moderate energy restriction enhances neutrophil oxidative burst activity in judoists. Severe energy restriction impairs neutrophil phagocytic activity, highlighting the importance of balanced weight management strategies.

Area of Science:

  • Sports Science
  • Immunology
  • Human Physiology

Background:

  • Neutrophil function is critical for immune response.
  • Weight reduction in athletes can impact immune parameters.
  • Judoists undergo intense training and weight management.

Purpose of the Study:

  • To assess the impact of exercise and energy restriction on neutrophil function in judoists.
  • To differentiate the effects of exercise training versus energy restriction on immune cells.

Main Methods:

  • Whole blood assay using flow cytometry.
  • Measurement of neutrophil oxidative burst, phagocytosis, and surface receptor expression (CD16, CD11b).
  • Analysis of immune parameters at multiple time points before and after competition.

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Main Results:

  • Exercise training increased neutrophil oxidative burst activity per cell and total activity.
  • Severe energy restriction significantly decreased neutrophil phagocytic activity.
  • Neutrophil surface antigen expressions (CD11b, CD16) remained unaffected by weight reduction.

Conclusions:

  • Weight reduction strategies for judoists should balance exercise and moderate energy restriction.
  • Severe energy restriction negatively affects neutrophil phagocytosis, potentially compromising immune function.
  • Optimized weight management is crucial for maintaining immune competence in athletes.