Authors: Whiting, Susan J.; Barabash, Wade A.

Source: Applied Physiology, Nutrition, and Metabolism, Volume 31, Number 1, February 2006 , pp. 80-85(6)

Publisher: NRC Research Press

Abstract:

The Dietary Reference Intakes (DRIs) are a set of recommendations for healthy persons. For the most part, recommendations are determined experimentally under controlled conditions of light activity. During increased physical activity, it is expected that micronutrient requirements would increase relative to the inactive state. Micronutrients of interest to athletes are those associated with oxygen handling and delivery, such as iron, and vitamin D, a newly emerging function of which is to maintain muscle strength. The DRI report on electrolytes (including water) is the most recent set of recommendations. In addition to recommendations for intakes to meet needs, many micronutrients have an upper level that indicates caution in consuming a large amount. We illustrate the process of setting DRI values for the micronutrients (including electrolytes and water), and provide a summary of instances where physical activity needs were considered when DRI values were derived. Understanding the origin of DRI values for micronutrients will assist in understanding how to use the values in assessment and planning.Key words: iron, vitamin D, electrolytes, physical activity, nutrient reference standards, adverse effects.

Les apports nutritionnels de référence (DRIs) sont un ensemble de recommandations pour des individus en santé. Dans la plupart des cas, ces recommandations sont établies expérimentalement dans des conditions strictes d'activité physique légère. Quand le niveau d'activité physique augmente, on s'attend à ce que les besoins de micronutriments augmentent par rapport à ceux du repos. Les micronutriments signifiants pour l'athlète sont ceux associés au transport et à l'utilisation de l'oxygène, comme le fer; on admet maintenant un nouveau rôle à la vitamine D, celui de maintenir la force musculaire. Les apports nutritionnels de référence (DRIs) concernant les électrolytes (incluant l'eau) font l'objet de nouvelles recommandations. Il faut considérer les recommandations sur les apports nécessaires aux besoins et savoir que plusieurs micronutriments ont une limite supérieure dangereuse à outrepasser. Nous présentons le processus d'élaboration des apports nutritionnels de référence en ce qui concerne les micronutriments (incluant l'eau et les électrolytes) et nous précisons quand nous avons pris en compte les besoins associés à l'activité physique. La compréhension de la provenance des apports nutritionnels de référence concernant les micronutriments permet de mieux évaluer et de mieux planifier les régimes alimentaires.Mots clés : fer, vitamine D, électrolytes, activité physique, valeurs de référence spécifiques, effets secondaires.[Traduit par la Rédaction]

Document Type: Research article

Publication date: 2006-02-01

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• This bimonthly journal has a 30-year history of publishing, first as the Canadian Journal of Sport Sciences, and later as the Canadian Journal of Applied Physiology. It publishes original research articles, reviews, and commentaries, focussing on the application of physiology, nutrition, and metabolism to the study of human health, physical activity, and fitness. The published research, reviews, and symposia will be of interest to exercise physiologists, physical fitness and exercise rehabilitation specialists, public health and health care professionals, as well as basic and applied physiologists, nutritionists, and biochemists.
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