Document Detail

Oxygen consumption using the K2 telemetry system and a metabolic cart.
MedLine Citation:
PMID:  8455457     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to compare measurements of oxygen consumption (VO2), ventilation (VE), and respiratory rate (RR) between a relatively new portable, telemetry system (K2) and a system that has been shown to be valid and reliable. Duplicate measurements were made at rest and during four levels of exercise in 10 subjects. Heart rate values were comparable for exercise at the same work level during gas collection using the two systems, indicating that the metabolic stresses were similar. Oxygen consumption measurements were significantly lower using the K2 system compared with a metabolic measurement cart (MMC). There was no significant difference in VE, but RR was lower for measurements made with the MMC. Compared with the MMC, the K2 system uses a slightly different formula to calculate VO2 because the content of carbon dioxide in expired air is not measured. To determine differences resulting from the method of calculating VO2, MMC measurements were applied to the formula used by the K2 system, and K2 values were adjusted using the RER values obtained from the MMC. There were no differences between these calculated values and the values obtained directly from either the MMC or the K2 system. Consequently, we concluded that the lower VO2 values obtained with the K2 system were attributed to the method of collecting and analyzing expired air, rather than to the method of calculating VO2.
C Peel; C Utsey
Related Documents :
19770807 - Pain threshold is achieved at intensity above anaerobic threshold in patients with inte...
8458797 - Ventilatory work and oxygen consumption during exercise and hyperventilation.
9721057 - Effect of cycling position on ventilatory and metabolic variables.
6681757 - Cardio-respiratory physical training in water and on land.
21907317 - Relation among body mass index, exercise training, and outcomes in chronic systolic hea...
8175597 - Dietary supplements affect the anabolic hormones after weight-training exercise.
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  25     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1993 Mar 
Date Detail:
Created Date:  1993-04-20     Completed Date:  1993-04-20     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  396-400     Citation Subset:  IM; S    
Department of Physical Therapy, School of Allied Health Sciences, University of Texas Medical Branch, Galveston 77550.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Analysis of Variance
Breath Tests
Calorimetry, Indirect / instrumentation,  methods
Exercise Test / instrumentation
Heart Rate*
Oxygen / analysis
Oxygen Consumption*
Physical Exertion / physiology*
Reproducibility of Results
Respiratory Function Tests / instrumentation,  methods
Telemetry / instrumentation*
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Reliability and variability of indicators of heart-rate monitoring in children.
Next Document:  VO2max estimation from a submaximal 1-mile track jog for fit college-age individuals.