| Alterations in body weight and composition consequent to 20 wk of endurance training: the HERITAGE Family Study. | |
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MedLine Citation:
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PMID: 10479196 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Obesity is a major public health problem in the United States. The role of physical activity and formal exercise in controlling body weight has not been clearly determined. OBJECTIVE: This study determined the magnitude of change in body weight and composition across sex, race, and age in response to 20 wk of endurance training. DESIGN: Men and women (n = 557) of various ages (16-65 y) and 2 races (black and white) exercised on cycle ergometers 3 d/wk for a total of 60 exercise sessions starting at 55% of maximal oxygen consumption (VO(2)max) for 30 min/session and building to 75% of VO(2)max for 50 min/session, where it was maintained during the last 6 wk. Skinfold-thickness measurements, circumferences, body composition (by hydrostatic weighing), and body fat distribution (by computed tomography scan at L4-L5 and the waist-hip ratio) were determined before and after training. RESULTS: All skinfold-thickness and circumference measures, waist-hip ratio, body mass index, total body mass, fat mass, percentage body fat, and computed tomography scan measures of total, subcutaneous, and visceral abdominal fat decreased with training, whereas total body density and fat-free mass increased. These changes were significant, but small. There were several differences in training response by sex and race, but not by age. CONCLUSIONS: A short-term exercise intervention can induce favorable changes in body composition, but the magnitude of these changes is of limited biological significance. Increasing physical activity likely has a major effect on body-composition and fat distribution characteristics only when it is of a greater magnitude and sustained for much longer periods |
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Authors:
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J H Wilmore; J P Després; P R Stanforth; S Mandel; T Rice; J Gagnon; A S Leon; D Rao; J S Skinner; C Bouchard |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article; Multicenter Study; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The American journal of clinical nutrition Volume: 70 ISSN: 0002-9165 ISO Abbreviation: Am. J. Clin. Nutr. Publication Date: 1999 Sep |
Date Detail:
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Created Date: 1999-09-30 Completed Date: 1999-09-30 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0376027 Medline TA: Am J Clin Nutr Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 346-52 Citation Subset: AIM; IM |
Affiliation:
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Department of Health and Kinesiology, Texas A&M University, College Station 77843-4243, USA. jwilmore@tamu.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aged Anthropometry Body Composition / physiology* Body Weight / physiology* Cardiovascular Diseases / prevention & control Exercise Therapy* Family Health* Female Humans Male Middle Aged Physical Endurance* Quality Assurance, Health Care Quality Control Risk Factors Time Factors Tomography, X-Ray Computed |
| Grant Support | |
ID/Acronym/Agency:
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HL45670/HL/NHLBI NIH HHS; HL47317/HL/NHLBI NIH HHS; HL47323/HL/NHLBI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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