I. Introduction
Sarcopenia is an aging-related muscle disorder characterized by a progressive reduction of muscle mass and muscle strength [1]–[2]. Estimates suggest that individuals over the age of fifty experience an annual decline in muscle mass ranging from 0.5 to 1.2%, and meanwhile an annual decline in muscle strength by 3%. The prevalence of sarcopenia increases to 10-27% after the age of sixty [3]–[4]. This has a profound effect on the well-being and quality of life for the elderly, leading to increased risks of falls, fractures, cognitive impairment, and mortality [5].