Inclusion Criteria:  Major patient; Man or woman ; Treated with intermittent hemodialysis for chronic renal failure; Affiliated with a social security scheme; Having given a signed agreement after detailed explanation of the protocol on the basis of the information sheet and likely to comply with it  Exclusion Criteria:  Patient with lower limb amputation more proximal than a transmetatarsal amputation (invalidity of the model for estimating body composition by BCM in this situation) Acute event in the 3 months preceding inclusion (infection, surgery). Having a neuromuscular pathology responsible for a motor deficit. Whose life expectancy does not exceed 6 months With a psychiatric pathology or cognitive impairment rendering him unable to give informed consent Pregnant women Patient under guardianship, curatorship or legal protection