title: Reliability and validity of a portable metabolic measurement system.
abstract: The purpose of this study was to assess the reliability and validity of a portable metabolic system (TEEM 100) during submaximal and maximal (VO2max) exercise using a computer-based metabolic system as the reference system (REF). Between repeated trials of submaximal exercise at three constant loads, differences in ventilation (Ve) and oxygen consumption (VO2) were 0.2 +/- 4.9 L . min-1 and 0.03 +/- 0.10 L . min-1 for REF, and 1.9 +/- 0.7 L . min-1 and 0.00 +/- 0.17 L . min-1 for TEEM 100. Pooled intraclass reliability coefficients for Ve and VO2 calculated from the repeated submaximal trials were r = .89 and r = .94 for REF, and r = .86 and r = .94 for the TEEM 100. Respiratory exchange ratio (RER) measured by the TEEM 100 was significantly higher (p = .01) at only the lowest workload. At VO2max, the TEEM 100 recorded significantly higher values for FeO2 (p = .01) and RER (p < .001). These results suggest that the TEEM 100 provides reliable and valid measurements of VO2 during submaximal and maximal exercise.
authors.affiliation: Department of Exercise Science, University of Massachusetts, Amherst 01003, USA.
authors.forename: E L
authors.initials: EL
authors.lastname: Melanson
authors.forename: P S
authors.initials: PS
authors.lastname: Freedson
authors.forename: D
authors.initials: D
authors.lastname: Hendelman
authors.forename: E
authors.initials: E
authors.lastname: Debold
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D002151:Calorimetry; D002245:Carbon Dioxide / Q000378:metabolism; D004734:Energy Metabolism; D004867:Equipment Design; D005080:Exercise Test / Q000295:instrumentation*; D017079:Exercise Tolerance; D005260:Female; D006339:Heart Rate; D006801:Humans; D007590:Jogging / Q000502:physiology; D008297:Male; D010101:Oxygen Consumption; D005082:Physical Exertion / Q000502:physiology; D011659:Pulmonary Gas Exchange; D015203:Reproducibility of Results; D012119:Respiration; D012815:Signal Processing, Computer-Assisted; D013147:Spirometry / Q000295:instrumentation; D016138:Walking / Q000502:physiology
chemical_list: D002245:Carbon Dioxide