Iron Status in Ultraendurance Triathletes

Area of Science:

• Sports Medicine
• Hematology
• Nutritional Science

Background:

• Ultraendurance athletes undergo significant physiological stress.
• Iron status is crucial for athletic performance and health.
• Previous assessments may have oversimplified iron status evaluation in athletes.

Purpose of the Study:

• To evaluate the iron status of ultraendurance athletes using multiple hematologic markers.
• To determine the prevalence of suboptimal iron indices in this population.
• To differentiate between true iron deficiency and other causes of abnormal iron markers.

Main Methods:

• Analysis of hematologic indexes in 50 ultraendurance athletes.
• Participation in the 1988 Ironman Triathlon in Hawaii served as the study cohort.
• Inclusion of various iron-related parameters beyond just hemoglobin.

Main Results:

• Fifteen (30%) of 50 athletes presented with at least one suboptimal iron index.
• Two athletes showed stage 2 iron deficiency with normal hemoglobin.
• Other athletes exhibited low transferrin saturation, abnormal total iron-binding capacity, or dilutional anemia.

Conclusions:

• Comprehensive assessment using several hematologic indexes is necessary for accurate iron status evaluation in triathletes.
• Abnormal iron indices in athletes do not always signify true iron deficiency.
• Further research is needed to understand the specific mechanisms affecting iron status in ultraendurance athletes.