 Aging is a complex process involving changes in both physical and mental health. It is associated with decreased muscle mass and strength, increased fat mass, and decreased bone density, leading to impairments in physical functioning and increasing the risk of non-communicable diseases, immobility and disability. In order to address these issues, it is important to understand how these different aspects of aging interact with one another. This can be done by examining the relationships between muscle mass, bone density, and fat mass, as well as the effects of aging on physical performance. This article was authored by Maria Spanidocchi, Konstantinos Giugini's, Maria Menzola, and others.