Validation of a New System for Measuring Ventilation and CO₂ Production

Gas exchange measurement systems are complex and require specialized facilities and expertise. As a result, access to these measurements remains limited, particularly in the field of sports performance. The aim of this validation study was to compare measurements obtained with a reference device and a new portable system.

Inclusion Criteria: * Male or female adults (aged ≥ 18 years). * Individuals affiliated with, or benefiting from, a health insurance or social security scheme. * Individuals capable of understanding and signing an informed consent form. * Individuals fluent in French. Exclusion Criteria: * Current tobacco smoking. * Any cardiovascular, respiratory, or musculoskeletal condition that could impair the ability to perform a maximal exercise test. * Individuals unwilling or unable to provide written informed consent. * Individuals with hierarchical, family, or close personal relationships with the principal investigator.