Validation of VO2000 Portable Metabolic Measurement System with Sedentary Pregnant Women

2.50
Hdl Handle:
http://hdl.handle.net/10755/160715
Type:
Presentation
Title:
Validation of VO2000 Portable Metabolic Measurement System with Sedentary Pregnant Women
Abstract:
Validation of VO2000 Portable Metabolic Measurement System with Sedentary Pregnant Women
Conference Sponsor:Midwest Nursing Research Society
Conference Year:2003
Author:Yeo, SeonAe
Contact Address:SON, 400 North Ingalls, Ann Arbor, MI, 48109-0482, USA
Co-Authors:Shay Murphy; Catherine L. Antonakos; David L. Ronis; Mickie Speers; Hiroaki Oe; Robert Hayashi; Nicole Stegman
Framework: Measurements are observations that describe phenomena that can be analyzed statistically. Accurate measurement of fitness is essential to provide evidence and clinical guidelines for promoting physical activities. Yet few instruments have been validated with pregnant women. Purpose: To determine the validity of portable metabolic measurement system with sedentary pregnant women. Subjects: Ten sedentary (<30 minutes and < 3 times per week exercise) pregnant women (30.3 +/- 2.8 yrs) signed the consent form approved by the IRB. Methods: Submaximal fitness tests were performed (Cornell protocol modified by Melanson et al.) at 18 and 28 weeks gestation with a portable metabolic measurement system (MedGraphics VO2000) and a gold standard (MedGraphics CPX/D). Results: Heart rate and oxygen consumption (ml/min/kg) increased over the stages of testing (p < .001). Neither CPX/D nor VO2000 found any change in fitness (predicted maxVO2) from 18 to 28 weeks (p > .05). The correlations between the two systems for VO2 were: .605 at 18 weeks; .685 at 28 weeks; and .586 (p < .05) when combined. The VO2000 measures on VO2, VCO2, and VE were significantly higher than measures on the same variables derived from the CPX/D (repeated measures ANOVA). For VO2 the mean (SD) were 14.7(2.6) ml/min/kg based on the VO2000 versus 12.1 (1.1) ml/min/kg based on the CPX/D (p < .01); for VCO2: 1489 (384) ml/min versus 1022 (275) ml/min (p < .001); for VE: 40.1 (10.0) L/min versus 34.0 (8.8) L/min (p < .05). Thus, compared to the gold standard, the VO2000 measures are biased upward. Conclusions: While the VO2000 has sufficient validity for research use, it is not a fully adequate substitute for the CPX/D. In particular, because of the systematic bias of the VO2000, one should not use VO2000 for one condition or time (e.g., as a pretest) and CPX/D for comparison. AN: MN030376
Repository Posting Date:
26-Oct-2011
Date of Publication:
17-Oct-2011
Sponsors:
Midwest Nursing Research Society

Full metadata record

DC FieldValue Language
dc.typePresentationen_GB
dc.titleValidation of VO2000 Portable Metabolic Measurement System with Sedentary Pregnant Womenen_GB
dc.identifier.urihttp://hdl.handle.net/10755/160715-
dc.description.abstract<table><tr><td colspan="2" class="item-title">Validation of VO2000 Portable Metabolic Measurement System with Sedentary Pregnant Women </td></tr><tr class="item-sponsor"><td class="label">Conference Sponsor:</td><td class="value">Midwest Nursing Research Society</td></tr><tr class="item-year"><td class="label">Conference Year:</td><td class="value">2003</td></tr><tr class="item-author"><td class="label">Author:</td><td class="value">Yeo, SeonAe</td></tr><tr class="item-address"><td class="label">Contact Address:</td><td class="value">SON, 400 North Ingalls, Ann Arbor, MI, 48109-0482, USA</td></tr><tr class="item-co-authors"><td class="label">Co-Authors:</td><td class="value">Shay Murphy; Catherine L. Antonakos; David L. Ronis; Mickie Speers; Hiroaki Oe; Robert Hayashi; Nicole Stegman </td></tr><tr><td colspan="2" class="item-abstract">Framework: Measurements are observations that describe phenomena that can be analyzed statistically. Accurate measurement of fitness is essential to provide evidence and clinical guidelines for promoting physical activities. Yet few instruments have been validated with pregnant women. Purpose: To determine the validity of portable metabolic measurement system with sedentary pregnant women. Subjects: Ten sedentary (&lt;30 minutes and &lt; 3 times per week exercise) pregnant women (30.3 +/- 2.8 yrs) signed the consent form approved by the IRB. Methods: Submaximal fitness tests were performed (Cornell protocol modified by Melanson et al.) at 18 and 28 weeks gestation with a portable metabolic measurement system (MedGraphics VO2000) and a gold standard (MedGraphics CPX/D). Results: Heart rate and oxygen consumption (ml/min/kg) increased over the stages of testing (p &lt; .001). Neither CPX/D nor VO2000 found any change in fitness (predicted maxVO2) from 18 to 28 weeks (p &gt; .05). The correlations between the two systems for VO2 were: .605 at 18 weeks; .685 at 28 weeks; and .586 (p &lt; .05) when combined. The VO2000 measures on VO2, VCO2, and VE were significantly higher than measures on the same variables derived from the CPX/D (repeated measures ANOVA). For VO2 the mean (SD) were 14.7(2.6) ml/min/kg based on the VO2000 versus 12.1 (1.1) ml/min/kg based on the CPX/D (p &lt; .01); for VCO2: 1489 (384) ml/min versus 1022 (275) ml/min (p &lt; .001); for VE: 40.1 (10.0) L/min versus 34.0 (8.8) L/min (p &lt; .05). Thus, compared to the gold standard, the VO2000 measures are biased upward. Conclusions: While the VO2000 has sufficient validity for research use, it is not a fully adequate substitute for the CPX/D. In particular, because of the systematic bias of the VO2000, one should not use VO2000 for one condition or time (e.g., as a pretest) and CPX/D for comparison. AN: MN030376 </td></tr></table>en_GB
dc.date.available2011-10-26T23:09:29Z-
dc.date.issued2011-10-17en_GB
dc.date.accessioned2011-10-26T23:09:29Z-
dc.description.sponsorshipMidwest Nursing Research Societyen_GB
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