Patient Empowerment for Major Surgery Preparation @ Home

Inclusion Criteria: * Patient eligible to elective major surgery (digestive, orthopedic, vascular-thoracic, urologic) * Age \> 70 years and/or American Society of Anesthesiologists (ASA) score 3-4 * or Unfit patient according to appropriate scores (Two among 3 scores (HAD, Physical activity score, nutritional score) below threshold). Unfit patients will be defined by at least 2 criteria if 'YES' answers: Physical activity: Less than 50% of WHO recommendations = less than 5000 steps/day or less than 75 min moderate activity/week or less than 12 min moderate activity/day Yes/No Malnutrition: BMI \< 20 kg/m2 if \< 70 years (or \<22 if \>70y) = undernutrition Yes/No or BMI\>25 kg/m2 (= overweight to obesity) or Loss of appetite? Mental evaluation HAD (Hospital Anxiety and Depression) \>8 for A or D score Yes/No * Diagnosis: Elective major surgery (digestive, orthopedic, vascular-thoracic, urologic) \- Regulatory aspects: Be legally able to give consent Patient affiliated to social security Exclusion Criteria: * Planned surgery (less than 4 weeks at inclusion) * Urgent surgery * Patient with, at baseline, good to excellent physical, nutritional, mental status as defined by appropriate scores. * Patient considered not eligible to this program for physical or psychological reasons by the surgeon or the anesthetist * Persons referred in Articles L1121-5 to L1121-8 of the French code of public health (this corresponds to all persons protected: pregnant or parturient women, breastfeeding mothers, persons deprived of liberty by judicial or administrative decision, persons subject to a legal protection measure).