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Sports anemia
1Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas.
Clinics in Sports Medicine
|April 1, 1992
Summary
Exercise impacts red blood cell production and survival, potentially altering hemoglobin and iron stores in athletes. However, iron deficiency anemia is rare, and routine supplementation is not advised for sports anemia.
Area of Science:
- Exercise physiology
- Hematology
Background:
- Exercise influences erythropoiesis and red blood cell survival.
- Athletes may experience altered hemoglobin and red cell indices.
- Decreased iron stores are a potential risk for athletes.
Purpose of the Study:
- To review mechanisms by which exercise affects red blood cells.
- To discuss the implications for athletes, including iron status.
- To clarify the diagnosis of sports anemia.
Main Methods:
- Literature review of studies on exercise and hematological parameters.
- Analysis of mechanisms affecting red blood cell production and lifespan.
- Discussion of iron metabolism in athletes.
Main Results:
- Exercise can cause subtle changes in hemoglobin and red cell volume.
- Athletes are at risk for reduced iron stores, but anemia is uncommon.
- A subset of athletes exhibits red cell changes solely due to sports participation.
Conclusions:
- Most exercise-induced red cell changes are mild.
- Routine iron supplementation is not recommended for athletes.
- Sports anemia is a diagnosis of exclusion, requiring careful evaluation.