What question did this study set out to answer?

To determine whether oral iron supplementation accelerates the recovery of hemoglobin, hematocrit, and endurance exercise performance following whole blood donation.

March 4, 2025The Journal of Strength and Conditioning Research

Iron Supplementation After Blood Donation Expedites Hematological Recovery but Does Not Influence Exercise Performance

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Authors

TJTyler B. JuddUniversity of Saskatchewan KSKeely A. ShawUniversity of Calgary JKJoel R. KrentzBrandon University

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Implication

Randomized trial demonstrates that iron supplementation expedites hematological recovery after blood donation in active adults, suggesting performance recovery is independent of iron status.

Key Points

To determine whether oral iron supplementation accelerates the recovery of hemoglobin, hematocrit, and endurance exercise performance following whole blood donation.
Ten moderately active adults (6 men, 4 women; mean age 34.0 ± 7.6 years) were stratified by sex and randomly assigned to receive either 60 mg of elemental iron (n=5) or placebo (n=5) daily for 5 weeks.
Hemoglobin concentration, hematocrit, and 5-km time trial performance were evaluated before donation, 1 day post-donation, and at weekly intervals for 5 weeks.
Five-kilometer time trial performance declined by 6.7% the day after donation (p < 0.001) and recovered to baseline by week 1, with no significant differences between groups.
Hemoglobin concentration dropped by 1.6 g·dl⁻¹ post-donation across all subjects (p < 0.01) and remained below baseline through week 5 in both groups.
Hematocrit decreased by 4.0% in the iron group and 3.1% in the placebo group post-donation (p < 0.001); hematocrit normalized to baseline by week 4 with iron (p = 1.0) but remained significantly depressed at week 5 with placebo (p < 0.05).

Cite This Study

Judd et al. (2025) studied this question.

synapsesocial.com/papers/6a729874439bab0cabc3e125 https://doi.org/10.1519/jsc.0000000000005082

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Implication

Randomized trial demonstrates that iron supplementation expedites hematological recovery after blood donation in active adults, suggesting performance recovery is independent of iron status.

Iron Supplementation After Blood Donation Expedites Hematological Recovery but Does Not Influence Exercise Performance

Discussion

Member takes

Implication

Key Points

Cite This Study

Iron Supplementation After Blood Donation Expedites Hematological Recovery but Does Not Influence Exercise Performance

Discussion

Member takes

Implication

Key Points

Cite This Study

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