Muscle loss associated with aging
Muscle loss starts early. Muscle tissue undergoes a slow degeneration of the order of 3 to 8% per decade in favor of fat since the age of 301. Thus, between 20 and 30 years, the percentage of muscle mass represents 30% of body mass and represents only 17% at 70 years old. Finally, between 25 and 75 years, muscle mass decreases by half !
When muscle loss reaches a certain level, it leads to a pathology : the sarcopenia2.
Preserving muscle mass throughout his life and detect muscle loss seem essential to promote successful aging.
1. Munro HN. Adaptation of body protein metabolism in adult and aging man. Clin.Nutr. 1982;1:95‑108.
2. Cruz-Jentoft AJ, Baeyens JP, Bauer JM, Boirie Y, Cederholm T, Landi F, et al. Sarcopenia: European Consensus on Definition and Diagnosis Report of the European Working Group on Sarcopenia in Older People. Age Ageing. 7 janv 2010;39(4):412‑423.