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Iron Supplementation After Blood Donation Expedites Hematological Recovery but Does Not Influence Exercise
Tyler B Judd1, Keely A Shaw2, Joel R Krentz3
1College of Kinesiology, University of Saskatchewan, Saskatoon, South Saskatchewan, Canada.
Journal of Strength and Conditioning Research
|March 3, 2025
Summary
Iron supplementation after blood donation aids hematological recovery but does not improve exercise performance. This study found that while iron helps restore blood counts faster, endurance performance returned to normal levels regardless of supplementation.
Area of Science:
- Exercise Physiology
- Sports Nutrition
- Hematology
Background:
- Blood donation impacts hemoglobin and exercise capacity.
- The role of iron supplementation in post-donation recovery is not well understood.
Purpose of the Study:
- To evaluate oral iron supplementation's effectiveness in speeding up recovery of hemoglobin, hematocrit, and exercise performance after blood donation.
Main Methods:
- 10 moderately active individuals were given either 60 mg of elemental iron or a placebo for 5 weeks post-donation.
- Hemoglobin, hematocrit, and 5-km time trial performance were measured before donation and for 5 weeks after.
Main Results:
- Exercise performance decreased post-donation but recovered within 1 week for both groups.
- Hemoglobin levels did not return to baseline within 5 weeks in either group.
- Hematocrit recovery was faster in the iron group, returning to baseline by week 4, while the placebo group did not recover by week 5.
Conclusions:
- Iron supplementation may accelerate hematological recovery after blood donation.
- Iron supplementation does not appear to influence the recovery of endurance exercise performance.
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