| Effect of season and exercise on dermal nitrogen losses and their relation to urinary nitrogen excretion. | |
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MedLine Citation:
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PMID: 4067668 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The present study was designed to estimate dermal nitrogen losses in summer and winter under the conditions of minimal daily activities, on a diet of standard Japanese protein intake level and to determine whether the increased dermal nitrogen losses induced by hot climate or exercise were compensated for by the decrease in urinary nitrogen excretion. Six healthy male university students served as the subjects. The daily dermal nitrogen losses (mean +/- SD) were 0.22 +/- 0.07 g or 3.10 +/- 0.58 mg/kg in winter and 0.44 +/- 0.19 g or 6.35 +/- 2.46 mg/kg in summer, showing significantly higher dermal nitrogen losses in summer than in winter. On the contrary, urinary nitrogen excretion tended to be larger in winter than in summer. Thus, renal compensation seemed to exist for the seasonal changes in dermal nitrogen losses. In the summer experiment, the subjects took light exercise besides the minimal daily activities for a 2-day exercise period. The pooled mean of daily dermal nitrogen losses during the exercise period was significantly larger than that during the sedentary period, while the urinary nitrogen excretion was almost the same in the two periods. No compensatory reduction in the urinary nitrogen excretion during the exercise period was observed under the conditions of the present study. |
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Authors:
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T Takahashi; S Muramatsu; M Suzuki |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of nutritional science and vitaminology Volume: 31 ISSN: 0301-4800 ISO Abbreviation: J. Nutr. Sci. Vitaminol. Publication Date: 1985 Jun |
Date Detail:
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Created Date: 1985-12-23 Completed Date: 1985-12-23 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0402640 Medline TA: J Nutr Sci Vitaminol (Tokyo) Country: JAPAN |
Other Details:
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Languages: eng Pagination: 363-73 Citation Subset: IM |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Body Weight Creatinine / urine Diet Dietary Proteins / metabolism Feces / analysis Humans Japan Male Nitrogen / metabolism*, urine Physical Exertion* Seasons* Skin / metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Dietary Proteins; 60-27-5/Creatinine; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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