Ultra-endurance exercise induces stress and inflammation and affects circulating hematopoietic progenitor cell...

Area of Science:

• Sports Medicine
• Hematology
• Immunology

Background:

• Amateur sports participation is rising, yet health risks for athletes remain understudied.
• Ultra-endurance exercise presents unique physiological stressors.
• Hematopoietic progenitor cells (CPCs) are crucial for immune function and regeneration.

Purpose of the Study:

• To investigate the effects of ultra-endurance exercise on CPCs in amateur athletes.
• To assess changes in hematological, inflammatory, metabolic, and stress markers post-exercise.
• To determine the relationship between exercise-induced stress and CPC functionality.

Main Methods:

• Analysis of circulating hematopoietic progenitor cells (CPCs) number and function.
• Measurement of hematological, inflammatory, clinical, metabolic, and stress parameters.
• Correlation analysis between stress markers (e.g., cortisol) and CPC function.

Main Results:

• Significant increases in leukocytes, platelets, IL-6, fibrinogen, enzymes, lactate, cortisol, and MMP-9 post-exercise.
• No change in CPC number, but a significant decline in CPC functionality observed.
• Negative correlation found between cortisol levels and CPC function, suggesting stress impact.

Conclusions:

• Ultra-endurance exercise induces significant metabolic stress and inflammation in amateur athletes.
• Exercise negatively impacts the function of hematopoietic stem and progenitor cells, crucial for immunity and regeneration.
• Potential long-term health implications for athletes engaging in extreme endurance events warrant further investigation.