| Vo2max in overweight and obese adults: do they meet the threshold criteria? | |
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MedLine Citation:
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PMID: 19952821 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The purpose of this study was to determine whether adiposity affects the attainment of (.)VO2max. METHODS: Sixty-seven male and 68 female overweight (body mass index (BMI) = 25-29.9 kg.m) and obese (BMI > or = 30 kg x m) participants undertook a graded treadmill test to volitional exhaustion (phase 1) followed by a verification test (phase 2) to determine the proportion who could achieve a plateau in (.)VO2 and other "maximal" markers (RER, lactate, HR, RPE). RESULTS: At the end of phase 1, 46% of the participants reached a plateau in (.)VO2, 83% increased HR to within 11 beats of age-predicted maximum, 89% reached an RER of > or = 1.15, 70% reached a blood lactate concentration of > or = 8 mmol x L, and 74% reached an RPE of > or = 18. No significant differences between genders and between BMI groups were found with the exception of blood lactate concentration (males = 84% vs females = 56%, P < 0.05). Neither gender nor fatness predicted the number of other markers attained, and attainment of other markers did not differentiate whether a (.)VO2 plateau was achieved. The verification test (phase 2) revealed that an additional 52 individuals (39%) who did not exhibit a plateau in (.)VO2 in phase 1 had no further increase in (.)VO2 in phase 2 despite an increase in workload. CONCLUSIONS: These findings indicate that the absence of a plateau in (.)VO2 alone is not indicative of a failure to reach a true maximal (.)VO2 and that individuals with excessive body fat are no less likely than "normal-weight" individuals to exhibit a plateau in (.)VO2 provided that the protocol is appropriate and encouragement to exercise to maximal exertion is provided. |
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Authors:
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Rachel E Wood; Andrew P Hills; Gary R Hunter; Neil A King; Nuala M Byrne |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 42 ISSN: 1530-0315 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-02-19 Completed Date: 2010-05-26 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: 470-7 Citation Subset: IM; S |
Affiliation:
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School of Human Movement Studies and Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia. re.wood@qut.edu.au |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adiposity
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physiology Adult Body Mass Index Exercise Test Female Humans Male Obesity* Overweight* Oxygen Consumption / physiology* Physical Endurance / physiology Pulmonary Gas Exchange / physiology Respiration Respiratory Function Tests / methods |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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