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sarcopenia
Sarcopenia (from Greek σάρξ ''sarx'', "flesh" and πενία ''penia'', "poverty") is the degenerative loss of skeletal muscle mass (0.5–1% loss per year after the age of 50), quality, and strength associated with aging. Sarcopenia is a component of the frailty syndrome. It is often a component of cachexia. It can also exist independently of cachexia; whereas cachexia includes malaise and is secondary to an underlying pathosis (such as cancer), sarcopenia may occur in healthy people and does not necessarily include malaise.
==Classification==
Sarcopenia is not a disease or a syndrome, and it is not always even a medical sign, because the degree to which it is normal (physiologic) versus abnormal (pathologic) is not determined. there is no generally accepted definition of sarcopenia in the medical literature.
The European Working Group on Sarcopenia in Older People (EWGSOP) developed a clinical definition and consensus diagnostic criteria for age-related sarcopenia, using the presence of both low muscle mass and low muscle function (strength or performance).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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