Most previous clinical trials that addressed the rehabilitation training system for sarcopenic elderly subjects focused on community-dwelling older adults who were relatively healthy. There is a notable paucity of high-quality research investigating the effects and feasibility of the device for hospitalized or institutionalized older people, who are generally frailer and more severe in functional impairment than those living in the community. Moreover, most reported the system were of long-term duration, which typically lasted 3 to 6 months with two sessions per week. It remains unclear whether short-term the device training would be effective for treating sarcopenia. Therefore, the investigators aimed to assess the effectiveness of Motor-Assisted and Active Resistive Upper/Lower Extremities Rehabilitation Training System for treating sarcopenia in hospitalized older patients aged 80 years and over.

Inclusion Criteria:

• Sarcopenia defined by the Asia Working Group of Sarcopenia (AWGS)
• Agree to participant this study and sign the informed consent
• Aged 80 years or over

Exclusion Criteria:

• Patients who could not follow the training plan due to cognitive impairment, emotional problems or any other reasons;
• Severe heart and lung diseases;
• Renal insufficiency;
• Any type of tumor;
• Bedridden patients