Thanks to advances in technology, home sensors are increasingly being used in the healthcare field, particularly for health assessment of the elderly. CART France is a research and development project that aims to improve the quality of life of the elderly. To do so, it aims at coupling digital biomarker information with biological and clinical biomarkers. Digital biomarkers mainly concern meal intake and mobility data. This paper presents the analysis of the first data obtained from the deployment of ambient sensors in a house. The combination of two types of sensors placed in the kitchen allows us to identify a correlation between mobility and personalized nutritional information.