1. Reliability and validity of a portable metabolic measurement system.
- Author
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Melanson EL, Freedson PS, Hendelman D, and Debold E
- Subjects
- Adult, Analysis of Variance, Calorimetry, Carbon Dioxide metabolism, Equipment Design, Exercise Tolerance, Female, Heart Rate, Humans, Jogging physiology, Male, Oxygen Consumption, Physical Exertion physiology, Pulmonary Gas Exchange, Reproducibility of Results, Respiration, Signal Processing, Computer-Assisted, Spirometry instrumentation, Walking physiology, Energy Metabolism, Exercise Test instrumentation
- 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.
- Published
- 1996
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