Approximately 2 million hip replacements are performed each year worldwide, relieving the pain of many patients with hip injuries and improving their quality of life. With the continuous development and innovation of science and technology, the performance of artificial joints is getting better and better, and the surgery is becoming more and more perfect, but these cannot replace or reduce the post-operative rehabilitation exercises. Because only active and appropriate functional exercises can achieve satisfactory results. So, how should patients exercise? Pre-operative exercise Before surgery, the patient can perform straight leg raising exercise. Method: The patient lies flat on the bed, straightens the lower limb, raises it as high as possible, then puts it down, and so on repeatedly. This method exercises the contraction of the quadriceps muscle, which can strengthen the knee extension and lay the foundation for recovery after surgery. Postoperative exercise The time to start activities after surgery varies due to different fixation methods. If the artificial hip joint is fixed with bone cement, the prosthesis is firmly attached to the bone during surgery. In the early postoperative period, the patient can move the joint in bed and try to stand on the ground with the help of crutches after two weeks, and gradually resume walking function after one month. If the bone cement is not applied, the bone tissue should be slowly grown into the pores of the prosthesis to lock the prosthesis, and the patient can gradually bear weight with the help of crutches only 3 months after surgery, and can resume normal walking after about half a year. Functional exercise can be carried out at home under the guidance of the doctor. Pay attention to the gradual progress, mainly to move the joints of the lower limbs and strengthen the muscle strength. You can also use a joint function rehabilitation device to passively move the joints. When exercising, avoid internal and external rotation of the hip joint to avoid dislocation. Patients can do bedside exercises first, then stand with crutches, and then walk with crutches after adaptation. Eventually, the crutches can be abandoned and the patient can walk independently or even ride a bicycle. Lifelong precautions Do not bend more than 90° whether standing or sitting. When sitting or lying down, avoid crossed legs (commonly known as erlang-legged) or cross-legged movements. Turn the whole body when turning, not just the upper body. Do not bend your hips to pick up things, you should use an extension pole or ask someone to help. Chairs, stools, sofas should be slightly higher, preferably with a backrest and armrests. It is not advisable to use squatting toilets, and toilets should not be too low, and it is better to have handrails to facilitate standing up.