The elderly always feel weak for the following general reasons: First, is the chronic disease is not well controlled, such as hypertension, diabetes, hyperlipidemia, coronary heart disease, these basic and chronic diseases are not well controlled, hypertension, hyperglycemia, hyperlipidemia, coronary heart disease and insufficient blood supply to the heart muscle, can cause weakness in the elderly. Second, is there a new disease, for example, is there a cough, cough is there a lung infection, is there acid reflux, belching is there a peptic ulcer. Thirdly, elderly people are a high prevalence of tumor patients and should be focused on. Fourth, poor feeding and malnutrition in the elderly, thus causing secondary anemia and decreased kidney function, can also cause weakness in the elderly. Fifth, the elderly themselves are weak and their activity capacity decreases resulting in sarcopenia, which is a natural phenomenon and can be improved by increasing nutrition and impedance exercise.