The DENUTADOM study is a single-center feasibility study. It is an interventional research project involving human subjects (RIPH2), which will lead to a change in the care and treatment of adult patients diagnosed as suffering from moderate to severe undernutrition during hospitalization. The aim of this study was to assess patient compliance with a new undernutrition management program (diet and physical activity) at discharge from hospital.

In this study, during hospitalization, patients may be included in the study if they meet the inclusion criteria. To this end, the physician will offer to participate in the study, and will provide the patient with an information document. If the patient agrees to take part, he or she will be included in the study after signing the consent form. Participation will last 3 months.

On inclusion, after seeing the physician, an adapted physical activity teacher (EAPA) and a hospital dietician will assess the patient's physical capacities and dietary needs, in order to draw up an adapted physical and dietary program. The CRA will assess the patient's quality of life using a questionnaire. When the patient is discharged, he will be given a notebook in which to keep track of appointments with healthcare professionals (GP, private dietician, EAPA). Patients are also asked to keep a record of their non-protocol care appointments and participation in physical activities.

After hospitalization, the patient will have to follow a multi-professional program: dietetic by a private dietician (at D3-J5, at 3 weeks and then at 6 weeks), medical by the general practitioner (at 1 month), and adapted physical activity by the EAPA (during 3 months).

At three months, the patient will be seen again by the hospital's health professionals. The investigating physician will reassess nutritional status, and the EAPA will reassess physical capacity. The patient will be asked to return his diary so that data can be collected. They will also be given a quality of life and satisfaction questionnaire to complete.

When all patients have completed their follow-up, a satisfaction questionnaire will be sent to each healthcare professional.

Currently, as part of standard care, , dietetics and physical rehabilitation are not reimbursed. As a result, although recommended, patients rarely benefit from a dietetic consultation and adapted physical activity follow-up following a diagnosis of undernutrition. We therefore hypothesize that early cooperative outpatient care, involving general practitioners, private dieticians and adapted physical activity teachers (EAPA), for adult patients diagnosed as moderately or severely malnourished during hospitalization will optimize the management of these patients.

Inclusion Criteria:

• Moderately or severely malnourished adult patient according to HAS diagnostic criteria: At least one phenotypic criterion: weight loss (> 5% in 1 month, > 10% in 6 months or relative to pre-disease weight), BMI < 18.5 in < 70 years or BMI < 22 in ≥ 70 years, reduced muscle mass and/or function AND At least one etiological criterion: reduction in food intake > 50% for > 7 days or > 14 days regardless of reduction, reduced absorption, aggressive situation with hypercatabolism
• Patient with an attending physician wishing to participate in the study
• Patient wishing to be followed by a private dietician participating in the study

Exclusion Criteria:

• Patients with cognitive disorders
• Patients with eating disorders
• Pregnant or breast-feeding patient
• Patient with an estimated life expectancy of less than 6 months (at investigator's discretion)
• Patient under legal protection
• Patient not affiliated to the social security system
• Patient who has not signed a free, written and informed consent form