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