Sarcopenic Obesity: Estimation of Prevalence and Identification of Clinical and Biological Determinants in a Population of Adult Obese Patients

Inclusion Criteria: * Age: 18-70 years * Sex: men and women * Patient followed in clinical nutrition benefiting from a metabolic assessment for optimization of clinical and paraclinical management * Patient meeting the criteria of obesity defined by BMI\> 30 kg / m² * Major patient with free, informed and signed consent * Patient covered by the social security scheme Exclusion Criteria: * Patient with cancer or severe chronic disease (renal failure, respiratory failure, liver failure) * Patient with neuromuscular disease * Patient with a total inability to walk * Minor patient * Refusal of the patient to participate in the study * Pregnant or lactating women * Patient deprived of liberty or under guardianship.