Assessment of the Impact of Body Position on Diaphragmatic Excursion in Obese Patients to Improve Proactice in Respiratory Kinesitherapy

Inclusion Criteria: * to have a BMI greater than or equal to 30; * to have not had intense physical activity during the hour preceding the measurements; * to be enrolled in a social security plan; * to give a written consent; * to have underwent a pre-inclusion medicalexamination. Exclusion Criteria: * to have a respiratory pathology unrelated to obesity (sleep apnea syndrome, obesity-hypoventilation syndrome, restrictive ventilatory syndrome with no other known cause); * to have a cardiac pathology not stabilized by drug treatment and/or resulting in heart failure and/or requiring the fitting of a pacemaker or defibrillator; * to have a chronic inflammatory disease (rheumatoid arthritis, Crohn's disease, cirrhosis, etc.); * to have a chest deformity (kyphoscoliosis, funnel chest, etc.); * to be anactive smoking or former smoker (stopped for less than 3 months and total consumption \> 10 pack-years); * to have an history of major surgery, surgery under general anesthesia for less than 3 months, or minimally invasive surgery for less than 1 year of the thoraco-abdomino-pelvic compartments; * to have a known sensitivity to monopropylene glycol (substance present in the sterile ultrasound gel); * temperature of the room in which the ultrasound measurements are carried out below 20°C or above 25°C; * subject under a measure of legal protection.