Test-retest reliability of a portable gas analysis system under free living conditions

Sundar Kumar Veluswamy; Vasudeva Guddattu; Arun G. Maiya

Test-retest reliability of a portable gas analysis system under free living conditions

Sundar Kumar Veluswamy, Vasudeva Guddattu, Arun G. Maiya

Research output: Contribution to journal › Article › peer-review

Abstract

Introduction: K4b₂ (COSMED Srl Italy) is a portable device that is considered valid and reliable for measuring oxygen uptake (VO₂) and carbon dioxide production (VCO₂) under laboratory conditions. Objectives: Evaluate the test-retest reliability of K4b2 during walking, stair climbing and descending stairs under free living conditions. Methods: Twelve participants completed two self-selected comfortable paced walking tests and 20 participants completed two self-selected comfortable paced stair climbing and descending tests. VO₂ and VCO₂ were measured during the tests using K4b₂. Results: ICCs for VO₂ (ICC & 95% CI: 0.91, 0.72-0.97) and VCO₂ (0.91, 0.72-0.97) of walking demonstrated high reliability whereas reliability was moderate for stair climbing (VO₂: 0.82, 0.6-0.93; VCO₂: 0.73, 0.44- 0.88) and low for descending stairs (VO₂: 0.67, 0.33-0.85; VCO₂: 0.51, 0.1-0.77). Conclusion: K4b2 is a highly reliable device for VO₂ and VCO₂ measurement during self-paced walking in free living environment.

Original language	English
Pages (from-to)	117-120
Number of pages	4
Journal	Indian Journal of Physiology and Pharmacology
Volume	59
Issue number	1
Publication status	Published - 2015

All Science Journal Classification (ASJC) codes

Physiology (medical)
Pharmacology
Physiology
Medicine(all)

Cite this

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title = "Test-retest reliability of a portable gas analysis system under free living conditions",

abstract = "Introduction: K4b2 (COSMED Srl Italy) is a portable device that is considered valid and reliable for measuring oxygen uptake (VO2) and carbon dioxide production (VCO2) under laboratory conditions. Objectives: Evaluate the test-retest reliability of K4b2 during walking, stair climbing and descending stairs under free living conditions. Methods: Twelve participants completed two self-selected comfortable paced walking tests and 20 participants completed two self-selected comfortable paced stair climbing and descending tests. VO2 and VCO2 were measured during the tests using K4b2. Results: ICCs for VO2 (ICC & 95% CI: 0.91, 0.72-0.97) and VCO2 (0.91, 0.72-0.97) of walking demonstrated high reliability whereas reliability was moderate for stair climbing (VO2: 0.82, 0.6-0.93; VCO2: 0.73, 0.44- 0.88) and low for descending stairs (VO2: 0.67, 0.33-0.85; VCO2: 0.51, 0.1-0.77). Conclusion: K4b2 is a highly reliable device for VO2 and VCO2 measurement during self-paced walking in free living environment.",

author = "Veluswamy, {Sundar Kumar} and Vasudeva Guddattu and Maiya, {Arun G.}",

year = "2015",

language = "English",

volume = "59",

pages = "117--120",

journal = "Indian Journal of Physiology and Pharmacology",

issn = "0019-5499",

publisher = "Association of Physiologists and Pharmacologists of India",

number = "1",

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TY - JOUR

T1 - Test-retest reliability of a portable gas analysis system under free living conditions

AU - Veluswamy, Sundar Kumar

AU - Guddattu, Vasudeva

AU - Maiya, Arun G.

PY - 2015

Y1 - 2015

N2 - Introduction: K4b2 (COSMED Srl Italy) is a portable device that is considered valid and reliable for measuring oxygen uptake (VO2) and carbon dioxide production (VCO2) under laboratory conditions. Objectives: Evaluate the test-retest reliability of K4b2 during walking, stair climbing and descending stairs under free living conditions. Methods: Twelve participants completed two self-selected comfortable paced walking tests and 20 participants completed two self-selected comfortable paced stair climbing and descending tests. VO2 and VCO2 were measured during the tests using K4b2. Results: ICCs for VO2 (ICC & 95% CI: 0.91, 0.72-0.97) and VCO2 (0.91, 0.72-0.97) of walking demonstrated high reliability whereas reliability was moderate for stair climbing (VO2: 0.82, 0.6-0.93; VCO2: 0.73, 0.44- 0.88) and low for descending stairs (VO2: 0.67, 0.33-0.85; VCO2: 0.51, 0.1-0.77). Conclusion: K4b2 is a highly reliable device for VO2 and VCO2 measurement during self-paced walking in free living environment.

AB - Introduction: K4b2 (COSMED Srl Italy) is a portable device that is considered valid and reliable for measuring oxygen uptake (VO2) and carbon dioxide production (VCO2) under laboratory conditions. Objectives: Evaluate the test-retest reliability of K4b2 during walking, stair climbing and descending stairs under free living conditions. Methods: Twelve participants completed two self-selected comfortable paced walking tests and 20 participants completed two self-selected comfortable paced stair climbing and descending tests. VO2 and VCO2 were measured during the tests using K4b2. Results: ICCs for VO2 (ICC & 95% CI: 0.91, 0.72-0.97) and VCO2 (0.91, 0.72-0.97) of walking demonstrated high reliability whereas reliability was moderate for stair climbing (VO2: 0.82, 0.6-0.93; VCO2: 0.73, 0.44- 0.88) and low for descending stairs (VO2: 0.67, 0.33-0.85; VCO2: 0.51, 0.1-0.77). Conclusion: K4b2 is a highly reliable device for VO2 and VCO2 measurement during self-paced walking in free living environment.

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Test-retest reliability of a portable gas analysis system under free living conditions

Abstract

All Science Journal Classification (ASJC) codes

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