quinta-feira, 26 de novembro de 2009

Performance Desportiva relaccionada com a ingestão vitaminica

 Sobre a relação entre o complexo de vitaminas B e os efeitos da sua carência para e os desportitista...o resumo de um artigo de 2006 publicado naInt J Sport Nutr Exerc Meta.

Active individuals lacking in B-vitamins may perform worse during high-intensity exercise and have less ability to repair and build muscle than individuals with nutrient-rich diets.

The B vitamins, which include thiamin, riboflavin, vitamin B6, vitamin B12, and folate (folic acid), are necessary for the body to convert proteins and sugars into energy. They are also used during the production and repair of cells, including red blood cells.

A team of researchers analyzed the diet and athletic performance of several elite athletes, collegiate athletes, and less competitive individuals. Even a marginal deficiency in B-vitamins negatively impacted markers related to cellular repair, efficiency, and immune function.

Exercise-induced stress, increased loss of nutrients (in sweat, urine and feces), and the additional nutrients needed to repair and maintain higher levels of lean tissue mass can all increase an athleteís B-vitamin requirements.

The researchers noted that current national B-vitamin recommendations for active individuals may be inadequate, and that chronic deficiencies could jeopardize athleteís abilities and long-term health. Athletes and individuals with poor and restricted diets should consider supplementation to ensure adequacy.
 Kathleen Woolf; Melinda M. Manore. Int J Sport Nutr Exerc Metab 2006(16)5.

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