 A thorough characterization of glucose metabolism and inflammaging in elderly subjects will help determine to what extent each of these factors affects muscle massfunction and contributes to age-related muscle wasting. The investigators will correlate patterns of insulin secretionsensitivity with muscle qualityquantity in diabetic and non-diabetic elderlies 70 years old. By comparing different groups healthy, sarcopenic, diabetic, diabeticsarcopenic, the investigators expect to identify an oxidativeinflammatory signature e.g., circulating interleukinsmyokines, plasma antioxidant capacity specific for the sarcopenic phenotype and related to muscle insulin resistance. 