Pre- or Per-dialytic Physical Exercise : a Cardioprotective Role?

Inclusion Criteria: * Patient aged ≥ 20 to ≤ 79 years * Undernourished patient according to the ARNOS score : ≥ 2 * No medical contraindication to physical activity * Life expectancy greater than 6 months * Patient on hemodialysis for more than 3 months * Patients with relatively good echogenicity Exclusion Criteria: * Patient is participating in another Category I interventional study, or has participated in another interventional study within the past 3 months * The patient is in an exclusion period determined by a previous study * The patient is under legal protection or under guardianship or curatorship * It turns out to be impossible to give the patient informed information, or the patient refuses to sign the consent * Pregnant, parturient or breastfeeding patient * Patient with a contraindication to retraining * Patient with valvular heart disease, arteriopathy of the lower limbs stage III and IV, amputation or knee or hip prosthesis * Patient with musculoskeletal problems * Patient with severe respiratory failure * Paired sleep apnea syndrome * BMI\> 35 * Patient with automatic implantable defibrillator * Heart transplant * Uncontrolled high blood pressure * Ejection fraction \<45% * Unstabilized coronaries * Non-contributory stress ultrasound