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标题：The Body Vitamin B1 Levels of Rats Fed a Diet Containing the Minimum Requirement of Vitamin B1 Is Reduced by Exercise
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作者：Katsumi SHIBATA ; Tsutomu FUKUWATARI
期刊名称：Journal of Nutritional Science and Vitaminology
印刷版ISSN：0301-4800
电子版ISSN：1881-7742
出版年度：2013
卷号：59
期号：2
页码：87-92
DOI：10.3177/jnsv.59.87
出版社：Center for Academic Publications Japan
摘要：It is thought that increasing energy expenditure increases consumption of vitamin B₁, leading to an increase in the requirement of vitamin B₁. However, evidence supporting this hypothesis is lacking. To examine the hypothesis, initially, we determined the minimum requirement of vitamin B₁ for weaning rats. We found that the minimum requirement of vitamin B₁ for optimum growth of weaning rats was around 0.786 mg thiamin/kg diet. Next, rats fed a diet containing the minimum requirement of vitamin B₁ were forced to swim until exhaustion. Concentrations of vitamin B₁ in the blood and liver as well as urinary excretion of swimming rats decreased significantly compared with those of non-swimming rats ( p <0.05), while in rats fed the diet containing a sufficient amount of vitamin B₁ (4.720 mg thiamin/kg diet), vitamin B₁ amounts in the blood, liver and urine were not affected by swimming. We clearly and firstly showed the reduction of body vitamin B₁ following increases in energy expenditure.
关键词：vitamin B1;requirement;exercise;rat;urine