Oral Microbiota and Muscle Function in the Ageing Subject

Inclusion Criteria: * Male or female adult volunteer, over 70 years of age * Non-hospitalised * Having read and understood the information letter and signed the consent form * Affiliated with a Social Security scheme Exclusion Criteria: * Already included in an interventional drug clinical trial * Unable to understand and complete the questionnaires * Deprived of liberty by an administrative or judicial decision or protected adult subject (under guardianship, curatorship or judicial protection order) * Receiving antibiotic treatment or having received antibiotic treatment during the previous 3 months * Taking or having taken probiotics during the previous 3 months * Having undergone colonic lavage/bowel cleansing during the previous 3 months * Presenting one of the following situations likely to alter the microbiota: active cancer, eating disorders, exclusive vegetarian diet, history of digestive surgery * Having a cardiac pacemaker * Living in a nursing home for dependent elderly persons (EHPAD)