Background Information
Iron is an essential constituent for the manufacturing of red blood cells in the bone marrow. An inadequate supply of iron impairs red blood cell production, which results in anemia which impairs oxygen delivery and subsequently aerobic metabolism especially during the stress of exercise. Iron deficiency without anemia may impair aerobic functioning although there is some controversy around this issue. Iron also plays a role in thermogenesis although the mechanism is not understood. Effects on HealthA well-rounded diet usually supplies enough iron to fulfill all of its roles, and 8 mg/day and 18 mg/day are recommended for men and women respectively. Women require more because of routine menstrual blood loss
Effects on PerformanceAthletes, especially those who run many miles in training, develop not only a sports anemia from hemodilution secondary to plasma expansion but also may deplete their iron stores as many of them incur hemolysis in the microvasculature from the trauma on the feet from running.
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