| Postprandial triacylglycerol in adolescent boys: a case for moderate exercise. | |
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MedLine Citation:
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PMID: 18461002 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To compare the effects of 60-min bouts of intermittent moderate and vigorous exercise on postprandial plasma triacylglycerol (TAG) metabolism in eight healthy adolescent boys (mean +/- SD age: 13 +/- 0.3 yr). METHODS: Participants completed three conditions in a counterbalanced order. On day 1, they either rested for 110 min (CON), completed 6 x 10-min blocks of intermittent treadmill exercise at 53% peak V O2 (MOD), or 6 x 10-min blocks at 75% peak V O2 (VIG). On day 2 after a 12-h fast, a capillary blood sample was taken for [TAG] and [glucose] (mmol.L) and then a high-fat milkshake was consumed (1.50 g.kg fat, 1.22 g.kg CHO, and 0.22 g.kg protein; 80 kJ.kg). Further blood samples were taken every hour for a 6-h postprandial rest period for [TAG] and [glucose]. RESULTS: Estimated energy expenditure was 45% higher in VIG than in MOD (95% confidence interval [CI] 23-72%). Fasting [TAG] and [glucose] did not differ between the conditions. Average [TAG] for the postprandial period was lower by 24% in MOD (95% CI -47% to 9%, P = 0.06) and by 21% in VIG (95% CI -42% to 8%, P = 0.08) than CON, with no meaningful difference (4%; 95% CI -27% to 48%, P = 0.50) between MOD and VIG. The total area under the [TAG] versus time curve (mmol.L 6 h) was lower by 24% in MOD (95% CI -42% to 0%, P = 0.05) and by 20% in VIG (95% CI -37% to 0%, P = 0.07) than CON. MOD and VIG were not different from each other (4%; 95% CI -18% to 32%, P = 0.54). CONCLUSION: Both 60 min of moderate and vigorous intermittent exercises reduced postprandial [TAG]. However, the extra energy expended in the vigorous condition did not produce a dose-related reduction compared with the moderate-intensity condition. |
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Authors:
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Keith Tolfrey; Alex Doggett; Craig Boyd; Susan Pinner; Adam Sharples; Laura Barrett |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 40 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2008 Jun |
Date Detail:
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Created Date: 2008-05-22 Completed Date: 2008-10-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
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Languages: eng Pagination: 1049-56 Citation Subset: IM; S |
Affiliation:
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Research Institute for Health and Social Change, Department of Exercise and Sport Science, Manchester Metropolitan University, Alsager, UK. K.Tolfrey@lboro.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Blood Glucose Child Dietary Fats / metabolism* Exercise / physiology* Female Humans Male Postprandial Period / physiology Sex Factors Triglycerides / blood* |
| Chemical | |
Reg. No./Substance:
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0/Blood Glucose; 0/Dietary Fats; 0/Triglycerides |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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