You can sit appropriately 1 week after the lower third of the tibia surgery, and you can sit for long periods of time as prescribed by the doctor at 4 weeks. After tibial fracture surgery, the affected leg should be placed flat on the bed, or elevated appropriately to help reduce swelling. Therefore, you can sit appropriately after 1 week, but it is not recommended to sit for a long time, otherwise it may not be conducive to the reduction of swelling. X-ray review can be done in 4 weeks. The fracture healing will be judged by observing the fracture end with X-ray to see if there is any bone scab formation or disappearance of fracture line. If the fracture line disappears and there is a bone scab formation, it means that the fracture is basically recovered and you can sit for a long time. At the same time, attention should be paid to active rehabilitation. Patients should keep their limbs active after the surgery, limb activity can promote muscle contraction, thus promoting the blood supply to the limbs, which is more important for fracture healing. At the same time, limb activity can also avoid limb swelling and complications. If there is any discomfort, it is recommended to consult a doctor for timely examination and targeted treatment.