The harm of the elderly sedentary is mainly to increase the risk of obesity, spinal disease, lower limb edema, muscle atrophy and other diseases. Sitting for a long time will lead to a reduction in the body’s energy consumption, fat accumulation and obesity; if you are in a sitting position is not correct, the waist and back muscles for a long time tense, there may be spinal diseases, such as cervical spondylosis and lumbar spondylosis; prolonged sitting will make the blood gather in the low-hanging parts of the lower limbs, resulting in mild lower limb edema. Sitting for a long time will also cause muscle fiber atrophy; slow down intestinal peristalsis, causing gastrointestinal discomforts such as indigestion and acid reflux; and slow down blood circulation, venous blood stagnation, and increased risk of thrombosis. It is recommended that the elderly try to avoid sedentary life, so as not to increase the risk of various diseases.