| Nitrogen balance in older individuals in energy balance depends on timing of protein intake. | |
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MedLine Citation:
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PMID: 20622139 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To explore whether nitrogen retention can differ on an isonitrogenous diet by changing when protein is consumed, we performed a short-term study in older individuals (64.5 ± 2.0 years) performing daily exercise while in energy balance. Participants consumed an isonitrogenous-isocaloric diet with the timing of a protein or carbohydrate beverage after exercise (protein after exercise [PRO], carbohydrate after exercise [CHO]) versus earlier in the day. Three-day mean energy balance (PRO: 202 ± 36 kcal and CHO: 191 ± 44 kcal; p = .68) did not differ between trials, but 3-day mean nitrogen balance was significantly more positive in the PRO (1.2 ± 0.32 g N) trial than the CHO trial (0.8 ± 0.45 g N; p < .05). Older individuals were better able to maintain nitrogen balance by simply changing when a portion of an identical amount of daily protein was consumed. |
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Authors:
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Leora Y Jordan; Edward L Melanson; Christopher L Melby; Matthew S Hickey; Benjamin F Miller |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't Date: 2010-07-09 |
Journal Detail:
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Title: The journals of gerontology. Series A, Biological sciences and medical sciences Volume: 65 ISSN: 1758-535X ISO Abbreviation: J. Gerontol. A Biol. Sci. Med. Sci. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-13 Completed Date: 2010-10-01 Revised Date: 2012-04-27 |
Medline Journal Info:
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Nlm Unique ID: 9502837 Medline TA: J Gerontol A Biol Sci Med Sci Country: United States |
Other Details:
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Languages: eng Pagination: 1068-76 Citation Subset: AIM; IM |
Affiliation:
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Department of Health and Exercise Science, Colorado State University, Fort Collins, CO 80523-1582, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Cross-Over Studies Dietary Carbohydrates / pharmacology Dietary Proteins / pharmacology* Energy Metabolism / physiology* Exercise / physiology Female Humans Male Middle Aged Nitrogen / metabolism* Nutritional Requirements Time Factors |
| Grant Support | |
ID/Acronym/Agency:
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1UL1 RR025780/RR/NCRR NIH HHS; K01AG031829-01/AG/NIA NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Dietary Carbohydrates; 0/Dietary Proteins; 7727-37-9/Nitrogen |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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