Study of Eating Behaviour and Sense of Taste Before and After Treatment With Nocturnal Continuous Positive Airway Pressure in Overweight Patients With Obstructive Sleep Apnea Syndrome.

"* VAS on the feeling of hunger~* Evaluation of food wanting by the Finlayson test~* PREFQUEST Questionnaire~* 24-hour food recall~* Stunkard Questionnaire~* Measurement of daytime sleepiness by Epworth score"

Actimeter delivery: it is worn on the wrist for 7 days, 24 hours a day.

2 dry tubes of 7 ml of blood collected at each visit for plasma assays (ghrelin, leptin, FGF 21, amino acids including tryptophan, insulin resistance)