This trembling action can be performed on the bed or floor at home. Drink a cup of cold water first, lie on your back on the bed (or on the floor), the pillow should not be too high, and your hands and feet should be flat naturally. After standing still for one minute, slowly raise your hands, keep your feet upright, and form a 90-degree angle with your body. Then gently shake your limbs at the same time for 3 ~ 5 minutes each time, once in the morning and once in the evening. This trembling exercise can promote blood circulation and help to treat headache, hypertension, heart disease, gastrointestinal diseases and back pain.