Inclusion Criteria:  Patient aged 18 and over Affiliated with social security Signature of informed consent Diagnosis of NAFLD characterized by the presence of ultrasound steatosis, with a diagnosis made by a physician after a clinical and paraclinical examination as is usually done in routine care and having eliminated another cause of chronic liver disease. Effective contraception system for women of childbearing age, a urine pregnancy test will be offered to these women as part of the assessment of the screening visit.  Exclusion Criteria:  Patient under legal protection Refusal to participate in the study Alcohol consumption ≥ 30 g/d for men or ≥ 20 g/d for women Presence of chronic liver disease from causes other than NAFLDs Inability to obtain 10 valid measurements when performing a FibroScan liver elasticity measurement or continuous CAP® steatosis assessment during initial evaluation. FibroScan ≥ 20 kPa at initial assessment Presence or history of advanced chronic liver disease (cirrhosis) decompensated (Child A6, B or C). Known history of a complication related to portal hypertension (including digestive haemorrhage related to portal hypertension, ascites or pleural effusion of cirrhotic cirrhosis, port-pulmonary hypertension). Notion of type 2 diabetes unbalanced with an HbA1c ≥ 9%, less than 3 months (measurement of HbA1c is not required before signing the consent form). Platelets < 150000/mm3, within the previous 6 months. Type 1 diabetes Weight loss ≥ 10% of usual body weight, in the 6 months prior to inclusion Introduction or dose modification of a GLP1 or orlistat agonist treatment < 1 year Practice of regular and/or intense physical activity, weekly (more than 3 hours per week) Patients with solid organ or bone marrow transplants Patient participating in another study evaluating a therapy to improve non-alcoholic fatty liver disease (NAFLD)  Contraindication to carrying out APA:  Absolute contraindication criteria:  Any unstable pathology affecting a vital organ in particular cardiovascular or pulmonary. Unstable means any situation in which the absence of urgent therapeutic intervention could lead to the death of the patient.  o Contraindication to physical activity Unstable acute coronary syndrome Decompensated heart failure Severe, uncontrolled ventricular rhythm disturbances Presence of an intracardiac thrombus with high embolic risk Presence of a medium to large pericardial effusion Recent history (<6 months) of thrombophlebitis with or without pulmonary embolism Severe and/or symptomatic left ventricular ejection obstruction Any progressive inflammatory and/or infectious disease Severe pulmonary arterial hypertension