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Dietary Reference Intakes for the micronutrients: considerations for physical activity.

Susan J Whiting¹, Wade A Barabash

¹University of Saskatchewan, Saskatoon, Canada. susan.whiting@usask.ca

Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquee, Nutrition Et Metabolisme

|April 11, 2006

Summary

Dietary Reference Intakes (DRIs) account for physical activity, increasing micronutrient needs for athletes. Understanding DRI origins aids in proper nutritional assessment and planning for active individuals.

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Area of Science:

Nutrition Science
Sports Nutrition
Human Physiology

Background:

Dietary Reference Intakes (DRIs) are established for healthy individuals under light activity.
Increased physical activity is expected to elevate micronutrient requirements.
Specific micronutrients like iron and vitamin D are crucial for athletes.

Purpose of the Study:

To explain the process of setting DRI values for micronutrients, electrolytes, and water.
To highlight instances where physical activity influenced DRI derivation.
To improve understanding of DRI origins for nutritional assessment and planning.

Main Methods:

Reviewing the methodology for establishing DRI values.
Analyzing DRI reports, including the latest on electrolytes and water.

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Identifying specific cases where physical activity was a factor in DRI recommendations.

Main Results:

DRIs are primarily based on controlled, low-activity conditions.
Physical activity can significantly alter micronutrient needs, particularly for athletes.
Upper intake levels for micronutrients are also considered to prevent excessive consumption.

Conclusions:

Understanding the basis of DRI values is essential for accurate nutritional assessment.
Athletes may require higher micronutrient intakes than the general population.
The DRI framework considers various factors, including physical activity, to provide comprehensive nutritional guidance.