title: Validation of the CardioCoachCO2 for submaximal and maximal metabolic exercise testing.
abstract: This study examined the validity of the CardioCoachCO2 metabolic system to measure oxygen capacity by comparison to a previously validated device. Fourteen subjects (8 men and 6 women; 25.9 +/- 6.6 years of age) completed 2 maximal graded exercise tests on a cycle ergometer. Subjects were randomly tested on the CardioCoachCO2 and Medical Graphics CardiO2/CP (MedGraphics) system on 2 separate visits. The exercise test included 3 submaximal 3-minute stages (50, 75, and 100 W for women; 50, 100, and 150 W for men) followed by incremental, 25 W, 1-minute stages until volitional fatigue (Vo2max). There was no significant difference between the CardioCoachCO2 and MedGraphics except at the 100 W stage (22.4 +/- 4.8 and 20.3 +/- 3.7 ml x kg(-1) x min(-1), p = 0.048, respectively). Spearman correlations demonstrated a strong correlation between the 2 devices at maximal Vo2 (R = 0.94). Bland-Altman plots demonstrated small limits of agreement, indicating that the 2 devices are similar in measuring oxygen consumption. This study indicates that the CardioCoachCO2 is a valid device for testing Vo2 at submaximal and maximal levels. Validation of this device supports the CardioCoachCO2 as a feasible and convenient method for testing participants and may be useful in the field or clinic.
authors.affiliation: Division of Biokinesiology and Physical Therapy at School of Dentistry, Clinical Exercise Research Center, University of Southern California, Los Angeles, California 90089, USA.
authors.forename: Christina M
authors.initials: CM
authors.lastname: Dieli-Conwright
authors.forename: Nicole E
authors.initials: NE
authors.lastname: Jensky
authors.forename: Gina M
authors.initials: GM
authors.lastname: Battaglia
authors.forename: Scott A
authors.initials: SA
authors.lastname: McCauley
authors.forename: E Todd
authors.initials: ET
authors.lastname: Schroeder
mesh_terms: D000328:Adult; D005080:Exercise Test / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D010101:Oxygen Consumption / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology