[Sarcopenia and metabolism.]

Sarcopenia has been defined as an age-related loss of skeletal muscle mass, strength and function, and its diagnostic criteria is based on usual gait speed, grip strength, and skeletal muscle mass. Whereas underlying pathophysiology and mechanisms of sarcopenia still remains to be established, recent studies have suggested that sarcopenia is a risk factor for metabolic disorders, showing an association with insulin resistance, diabetes, and metabolic syndrome in elderly people.