Biological Aging of Skeletal Muscles in Humans, a Monocentric, Prospective Study

Aging affects almost all the tissues and physiological functions, and skeletal muscle is the most affected organ. The progressive decline of the weight and the muscular function linked to the aging contributes to the lack of autonomy and dependence, but also to an increase of the mortality risks. Sarcopenia is also a prevalent condition, because it is detected in 13-24% of 60 years old, and 50% of 80 years old and more. However, strong inter-individual variations of this prevalence of sarcopenia exists. The key issue is to understand why the biological aging of the skeletal muscle is so different between people. In this study, mechanisms involved in biological aging of the skeletal muscle in aging people (same chronological age) will be specified.