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Title Comparing a Portable and Standard Metabolic Measuring System during Rest and Exercise
Author WINKLE JASON M., EVANS BLANCHE W., DILG PETER, GALPAROLI SARAH
Abstract
Winkle JM, Evans BW, Dilg P, Galparoli S. Comparing a Portable and Standard Metabolic Measuring System during Rest and Exercise. JEPonline 2011;14(2):80-87. The usefulness of a portable metabolic measuring system is dependent upon its ability to produce valid and reliable results when compared to standard laboratory equipment such as non-portable metabolic measuring systems. Results from studies
comparing the VO2000 with non-portable systems have been inconsistent. The purpose of this study was to compare the metabolic and ventilatory values during exercise using a portable metabolic measuring system (VO2000) with a facemask (FM) and mouthpiece/ nose clip (MP) and a standard laboratory metabolic measuring system, CPX-Ultima (CPX/U). Eighteen volunteers (age = 25.7 ± 7.2 yrs) completed three 20 min exercise sessions (10 min walking/10 min jogging) using the CPX/U, FM, and MP. A counter-balanced design determined treatment order. Metabolic and ventilatory values were recorded at 20 sec intervals and averaged over the last 5 min of walking and jogging. A one-way ANOVA with repeated measures compared the
mean values for each variable for the three conditions during walking and jogging. No significant difference (p > 0.05) in HR or VO2 was found due to treatment order. The VO2000 produced similar metabolic and ventilatory values whether using the FM or MP (p > 0.05). However, significant differences (p < 0.01) were found for VE, VO2, VCO2, and RER among the CPX/U, FM and MP during walking and jogging. The VO2000 overestimated VO2 compared to the CPX/U by 2.4 mL.kg-1.min-1 during walking and 6.9 mL.kg-1.min-1 during jogging.
Citation
Keywords Oxygen Uptake, Portable Metabolic Measuring System
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