| Autor: |
McClung HL; Military Performance Division, US Army Research Institute of Environmental Medicine (USARIEM), 10 General Green Ave., Natick, MA 01760, USA., Tharion WJ; Military Performance Division, US Army Research Institute of Environmental Medicine (USARIEM), 10 General Green Ave., Natick, MA 01760, USA., Walker LA; Military Performance Division, US Army Research Institute of Environmental Medicine (USARIEM), 10 General Green Ave., Natick, MA 01760, USA., Rome MN; Oak Ridge Institute for Science and Education (ORISE), 1299 Bethel Valley Rd., Oak Ridge, TN 37830, USA., Hoyt RW; Military Nutrition Division, US Army Research Institute of Environmental Medicine (USARIEM), 10 General Green Ave., Natick, MA 01760, USA., Looney DP; Military Performance Division, US Army Research Institute of Environmental Medicine (USARIEM), 10 General Green Ave., Natick, MA 01760, USA. |
| Jazyk: |
angličtina |
| Zdroj: |
Sensors (Basel, Switzerland) [Sensors (Basel)] 2023 Feb 23; Vol. 23 (5). Date of Electronic Publication: 2023 Feb 23. |
| DOI: |
10.3390/s23052472 |
| Abstrakt: |
There are several methods available to assess energy expenditure, all associated with inherent pros and cons that must be adequately considered for use in specific environments and populations. A requirement of all methods is that they must be valid and reliable in their capability to accurately measure oxygen consumption (VO 2 ) and carbon dioxide production (VCO 2 ). The purpose of this study was to evaluate the reliability and validity of the mobile CO 2 /O 2 Breath and Respiration Analyzer (COBRA) relative to a criterion system (Parvomedics TrueOne 2400 ® , PARVO) with additional measurements to compare the COBRA to a portable system (Vyaire Medical, Oxycon Mobile ® , OXY). Fourteen volunteers with a mean of 24 years old, body weight of 76 kg, and a VO 2peak of 3.8 L∙min -1 performed four repeated trials of progressive exercises. Simultaneous steady-state measurements of VO 2 , VCO 2 , and minute ventilation (V E ) by the COBRA/PARVO and OXY systems were conducted at rest, while walking (23-36% VO 2peak ), jogging (49-67% VO 2peak ), and running (60-76% VO 2peak ). Data collection was randomized by the order of system tested (COBRA/PARVO and OXY) and was standardized to maintain work intensity (rest to run) progression across study trials and days (two trials/day over two days). Systematic bias was examined to assess the accuracy of the COBRA to PARVO and OXY to PARVO across work intensities. Intra- and inter-unit variability were assessed with interclass correlation coefficients (ICC) and a 95% limit of agreement intervals. The COBRA and PARVO produced similar measures for VO 2 (Bias ± SD, 0.01 ± 0.13 L·min -1 ; 95% LoA, (-0.24, 0.27 L·min -1 ); R 2 = 0.982), VCO 2 (0.06 ± 0.13 L·min -1 ; (-0.19, 0.31 L·min -1 ); R 2 = 0.982), V E (2.07 ± 2.76 L·min -1 ; (-3.35, 7.49 L·min -1 ); R 2 = 0.991) across work intensities. There was a linear bias across both the COBRA and OXY with increased work intensity. The coefficient of variation for the COBRA ranged from 7 to 9% across measures for VO 2 , VCO 2 , and V E . COBRA was reliable across measurements for VO 2 (ICC = 0.825; 0.951), VCO 2 (ICC = 0.785; 0.876), and V E (ICC = 0.857; 0.945) for intra-unit reliability, respectively. The COBRA is an accurate and reliable mobile system for measuring gas exchange at rest and across a range of work intensities. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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