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Updated: May 29, 2026
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Published on: May 26, 2021
Endurance exercise training promotes medullary hematopoiesis
J M Baker1, Michael De Lisio, Gianni Parise
1Department of Kinesiology, McMaster University, Hamilton, ON, Canada.
Summary
Endurance exercise significantly boosts blood cell production (hematopoiesis) by improving bone marrow and increasing muscle-derived factors. This study reveals exercise as a potent hematopoiesis enhancer.
Area of Science:
- Exercise physiology
- Hematology
- Stem cell biology
Background:
- Endurance exercise is recognized as a potent modulator of hematopoiesis.
- The precise mechanisms by which exercise influences blood cell formation remain incompletely understood.
Purpose of the Study:
- To investigate the direct impact of endurance exercise training on hematopoiesis.
- To identify the underlying mechanisms responsible for exercise-induced hematopoietic changes.
Main Methods:
- Mice underwent a 10-week progressive treadmill training program.
- Hematopoietic stem and progenitor cells were quantified using flow cytometry and functional assays.
- Gene and protein expression of hematopoietic cytokines and bone marrow histology were analyzed.
Main Results:
- Endurance training increased medullary and mobilized hematopoietic stem and progenitor cells by 50-800%.
- Training reduced bone marrow fat content by 78% and enhanced bone marrow niche architecture.
- Skeletal muscle hematopoietic cytokine expression increased by at least 60%.
Conclusions:
- Endurance exercise training robustly promotes hematopoiesis.
- Exercise enhances hematopoiesis through improved bone marrow niche structure and increased skeletal muscle cytokine production.
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