27 February 2015

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

Posted in Scientific News, Validation News, K4b2/K5

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

A new validation paper has been published on the Indian Journal of Physiology and Pharmacology where was shown the test-retest reliability of the K4b2.

This study was undertaken to assess test-retest reliability of K4b2 in measuring VO2 and VCO2 during walking, stair climbing and descending stairs in a free living environment.

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.

The conclusions of the study prove that "test-retest measures using K4b2 are highly reliable when tests are performed in a similar manner. If similarity in testing conditions is maintained, K4b2 can be used to measure effect of interventions on VO2 and VCO2 in free living environment".

The article details are the following:

- Title: "Test-retest reliability of a portable gas analysis system under free living conditions"
- Authors
: Sundar Kumar Veluswamy, Vasudeva Guddattu and Arun G. Maiya - Department of Physiotherapy, School of Allied Health Sciences, Manipal University, Manipal, Karnataka, India
- Published in
:Indian J Physiol Pharmacol 2015; 59(1) : 117–120

The full article can be downloaded at the following link: click here


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Founded in 1980, COSMED is a privately owned company manufacturing Cardio Pulmonary and Metabolic Diagnostic Equipment. COSMED products include a full range of Spirometers, Pulmonary Function, Body Composition, Nutritional Assessment and Cardio Pulmonary Exercise systems, including Electrocardiographs, Ergometers and Assessment Software. COSMED solutions are aimed for either professional or medical use for many different applications like: Hospital, Clinics, Primary Care, University & Education in Human Physiology, Clinical Nutrition, Commercial Weight Management, Human Performance Centers, Sport Institutions and Health Club Industry. COSMED Headquarters are located in the province of Rome, Italy. COSMED has subsidiaries in the USA, China and Germany, and distributes its products internationally through a constantly growing distributor network covering more than 70 countries.