02 August 2016

Portable open-circuit spirometry systems: a review.

Posted in Scientific

indirect calorimetry

A new review study has been published in the Journal of Sports Medicine and Physical Fitness discussing the validity, reliability and principles of operations of existing portable open-circuit spirometry system.

Portable open-circuit spirometry systems are widely used in the field of exercise physiology, especially in field settings when freedom of movement is required. With advances in technology, these devices have become increasingly sophisticated, smaller, and lighter; which allows for VO2 to be measured during a wide range of activities, including bicycling, running, speed skating, rowing, soccer, and other sports.

The purpose of this review was to describe the evolution of portable open-circuit spirometry systems, and discuss their validity, reliability, and principles of operation.

The study, submitted in 2015 (when K5 was not yet available in the market), announced nevertheless the newest version of portable systems (COSMED K5) and the opportunity it gives to provide researchers the option of using either micro-proportional sampling or breath-by-breath techniques within the same system (thanks to the COSMED patented dual gas sampling system IntelliMET).

According to the authors "This new development challenges the prevailing view, which holds that the breath-by-breath technique is the more advanced and desirable method in all situations. In our view, the breath-by-breath method is potentially subject to more errors due to alinearity of the sensors and temporal mis-matching of ventilation and gas fractions. Future research should examine the hypothesis that micro-proportional sampling systems yield more consistent measures of steady-state oxygen uptake than breath-by-breath systems. The COSMED K5 will provide an opportunity, for the first time, for researchers to compare the validity and reliability of these two techniques within the same device."

The article details are the following:

- Title: "Portable open-circuit spirometry systems: a review"
- Authors: Overstreet BS, Bassett DR Jr, Crouter SE, Rider BC, Parr B
- Published in
:J Sports Med Phys Fitness. 2016 Feb 10

The study can be purchased at the following link: click here