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  Iron

 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 Health
A 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 Performance
Athletes, 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.
 
 Supplement Range
 
  1. Screening for iron deficiency with or without anemia requires a complete blood count (CBC) as well as measuring serum ferritin concentration. The ferritin assay is expensive, and there are certain inflammatory processes, which may artificially raise the ferritin level as it becomes an acute phase reactant.

  2. The following recommendations should be adhered to in competitive athletes while in training:

  3. Dietary counseling to insure adequate intake of iron in the athletes diet.

  4. Inquiring thoroughly about the athlete's diet and past history of ulcers, excessive menstrual bleeding, or anemia.

  5. In all athletes in whom there has been substantial, inexplicable decrease in aerobic performance, a CBC and serum ferritin should be drawn.

  6. Male athletes who do not have a history of ulcer disease, anemia, or a decrease in performance do not require routine blood tests.

  7. Men who have any of the symptoms above or who are experiencing a drop in performance should have a CBC and serum ferritin as well as a stool quaiac.
  8. All women in active aerobic training should have a screening CBC; and if there is any hint of a problem (excessive menses, poor training), a CBC should be drawn and if abnormal, a serum ferritin should be measured. If iron deficiency is discovered then athletes should take iron sulfate 300 mg three times a day.
  9. emale athletes with a less than optimum dietary intake should consider taking a multivitamin with iron each day.
 

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