Evaluation of Respiratory Function During Self-induced Cognitive Trance

Inclusion Criteria: * Person over 18 years old * Person with expertise in the practice of TCAI. (at least 6 months, in order to be able to control the depth of the trance and to have a motor control allowing the realization of a spirometry) * Person affiliated with social security or beneficiary of such a scheme. * Person having given, in writing, their free and informed consent to participate in the study Exclusion Criteria: * Person deprived of liberty by judicial or administrative decision, person subject to a measure of legal protection. * Exclusion period for other studies * Person likely, according to the investigator's assessment, not to be cooperative or respectful of the obligations inherent in participation in the study * Person with a psychiatric, neurological or cardiovascular disease. * Person with a chronic respiratory disease, for example: asthma, COPD, interstitial lung disease, bronchial dilation, cystic fibrosis, * Person with a history of exercise-induced bronchospasm. * Person taking inhaled treatments (corticotherapy, bronchodilators, anticholinergics) * Pregnant woman (declarative).