| Ghrelin But Not PYY Is Related To Change In Body Weight and Energy Availability. | |
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MedLine Citation:
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PMID: 21502892 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE:: The aim of this study was to examine changes in fasting total PYY and ghrelin in non-obese premenopausal women following an exercise and diet program with and without weight loss. METHODS:: Body composition, energy balance parameters, ghrelin, and PYY were measured before and after a three month intervention in non-exercising controls (n=7), and exercising women who either remained weight stable (n=5) or lost weight (n=10). At baseline subjects were 20.6±2.2years, weighed 58.0±4.8kg, and were 27.2±4.9% body fat. Supervised exercise training occurred five times a week for up to 90min at 70-80% of maximum heart rate. Subjects were fed a controlled diet. RESULTS:: Body weight (-3.2±0.8kg) and fat mass (-2.6±0.7kg) decreased significantly in the weight-loss exercise group. Neither fasting ghrelin nor PYY changed in response to exercise training in the absence of weight loss, and PYY did not change with exercise and weight loss. Fasting ghrelin did reveal a significant time by experimental group interaction (p=0.025). The change in ghrelin was inversely correlated with the change in body weight, BMI, fat-free mass and energy availability. CONCLUSION:: Neither fasting ghrelin nor fasting PYY appear to play a role in the adaptive changes associated with exercise training when exercise occurs in the absence of weight loss. Fasting ghrelin concentrations increase when body weight is lost and may respond to even smaller changes in energy availability. However, fasting PYY does not appear to play a key role in the regulation of energy balance during diet and exercise associated weight loss. |
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Authors:
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Jennifer L Scheid; Mary Jane De Souza; Heather J Leidy; Nancy I Williams |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-4-14 |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: - ISSN: 1530-0315 ISO Abbreviation: - Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-4-19 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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1 Women's Health and Exercise Laboratory, Noll Laboratory, Department of Kinesiology, Penn State University, University Park, PA, USA, 16802 2Department Nutrition & Exercise Physiology, University of Missouri, Columbia, MO, 65211. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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