How to reasonably perform weight-bearing exercises after undergoing surgical treatment of the lower extremity is an issue that is often overlooked for a number of reasons. Premature weight-bearing on the operated limb may cause wound dehiscence and bleeding, a certain degree of swelling and pain in the injured limb involved in weight-bearing again, premature activity may affect the stability of the fixation and cause failure of the fixation device, and so on. So most people tend to choose the more prudent way – to stay in bed until long after the surgery. However, the human body is a highly adaptable and intelligent device, and the use of in and out is very well reflected in our body. For example, people living in highland areas generally have higher than average hemoglobin concentrations, and those who regularly participate in exercise tend to have much greater hot lung capacity than normal. This phenomenon is also evident in the locomotor system. The right upper limb of a right-handed person will be somewhat thicker than the left, and the muscles and bones of an athlete are much more robust than the norm. In orthopedic surgery, the goal is often to reconstruct the form and function of the lower extremity. Long-term bed rest will lead to a series of disuse changes in limb function: such as muscle wasting atrophy and laxity, reduced joint flexibility, while weight-bearing stimulation is a necessary condition for osteogenesis and calcium salt accumulation, the lack of weight-bearing stimulation will lead to bone breaking enhancement and calcium salt loss, not focusing on weight-bearing exercise may cause postoperative osteoporosis, and even delayed healing and non-healing of the osteotomy site. This will directly affect the outcome of the surgery and cause a certain degree of loss of limb function. In addition to ensuring the normal activities of the skeletal musculo-articular system, weight-bearing exercises are also important for maintaining the blood circulation in the lower limbs. Blood circulation is an important condition for the normal metabolism of the body. The human body carries away the waste generated by local metabolism through blood circulation, while transporting the nutrients absorbed by the digestive system to all parts of the body to maintain normal life activities. Stagnant blood circulation has a direct impact on wound repair and functional recovery of the lower extremities. In addition, for older patients, early weight-bearing exercises can also effectively reduce a series of bed-ridden complications, such as pneumonic pneumonia, decubitus ulcers, deep vein thrombosis in the lower extremities, and so on. Then many people ask, early exercise is so many problems, and weight-bearing exercise is so important for lower limb function recovery. How should you choose the time and intensity of exercise, what problems caused by the exercise process need to be noted and dealt with, and which cases can be ignored? The following is a basic suggestion for everyone: Basic conditions: 1. The acute period of surgical trauma has passed. 3~5 days after surgery is the acute period of trauma. During this period, the local capillaries of the wound are dilated, acute inflammatory reaction occurs locally, and the painful swelling around the wound is obvious. After 5 days, the wound enters a period of hyperplasia and scar formation, with contraction of soft tissues and blood vessels. This is the time to gradually selective weight-bearing exercise. 2.Stability of fixation. For bony surgery, the early stable fixation of the osteotomy end is an important factor for bone healing. For certain surgeries where firm fixation is not possible, or when internal fixation is applied to fix the osteotomy end, the selection of weight-bearing exercise must be postponed to avoid the failure of the fixation device and the displacement of the broken end. The formation of a stable mechanical structure on both sides of the osteotomy position is necessary for early exercise in bony surgery. 3, conscious control of force. In tendon anastomosis or transfer surgery, the anastomosis site will become edematous and brittle at one week after surgery due to inflammatory reaction and blood flow disorder. If the muscle is contracted subconsciously during weight-bearing, it may lead to the rupture of the tendon anastomosis site. Therefore, it is important to control certain forces according to the doctor’s requirements and not to perform the exercise blindly. No matter what kind of exercise, the most important principle is gradual. After a few days of bed rest, the body’s blood pressure will undergo an adaptive decrease, at this time, if you quickly get up and get down, it is easy to cause standing hypotension, resulting in insufficient blood supply to the brain, dizziness, cold sweat, pale face, weakness of the limbs and other phenomena. Therefore, when you start to exercise, you must first sit up slowly, then gradually hang your legs to the side of the bed, and gradually stand up with the help of others after slowly adapting. After standing and stabilizing, gradually increase the weight-bearing sensation of the operated limb, and then try to walk. Early exercise must not be aimed at time and distance, but must first slowly use the full strength to allow the operated limb to return to normal weight-bearing and form a good memory, otherwise it will not only fail to achieve the purpose of exercising the operated limb, but also increase the burden on the contralateral limb. After the limb is fully weight-bearing, the distance and time of walking can be gradually increased, but the amount of exercise must be controlled within the body’s adaptation range. The concept of physical endurance is emphasized here. The patience of the Chinese people is far beyond our imagination. In the past, I treated some foreign patients who had zero tolerance for pain and asked their doctors to give pain medication whenever they felt a little discomfort. In contrast, in the outpatient clinic, we often encounter patients who come to the clinic with very serious conditions, which is very much related to the Chinese people’s tradition of enduring hardship. This is related to the Chinese people’s tradition of enduring hardship. Therefore, we often find many patients in the ward who exercise despite the consequences. This situation is totally undesirable. The body has its own set of feedback mechanisms for injuries. When the injury exceeds the body’s capacity, the body will show swelling, pain and many other adverse reactions to remind us to pay attention to their own protection. If you ignore these warnings and continue to exercise, you will cause more serious damage to the body. Our body’s ability to recover is limited, and hasty exercise can only aggravate the damage to the body and have the opposite effect. Therefore, the correct attitude to exercise should be to gradually extend the distance and time of exercise. The specific amount of exercise should be adjusted according to how your body feels. When exercise causes physical discomfort to rest in time, give the body enough rest time. Rest is an important condition for the body to repair itself from injury, and the combination of work and rest is the basis for maximum efficiency. When increasing the amount of exercise, you can refer to the number of times – distance – time order. After determining a certain intensity of exercise body can adapt, you can first increase the number of exercises on the basis of this exercise volume, after adaptation and then increase the walking distance, and finally extend the exercise time. Until the return to the normal walking pattern. These are some suggestions about weight-bearing exercise. Finally, it is emphasized that the specificity of the human body and the condition determines that each treatment method is not suitable for all people. When referring to the above advice, it is important to seek the advice of the bedside doctor and not to exercise blindly to avoid adverse consequences.