The most important feature of functional exercise is that patients can actively participate in the treatment process by themselves, which is conducive to mobilizing the subjective initiative of patients in treatment and enhancing their confidence in overcoming the disease. In the prevention and treatment of lumbar disc herniation has a role that cannot be ignored. Its role is as follows: (1) In the acute phase of lumbar disc herniation, functional exercise is mainly a combination of adaptive pulling exercise and relaxation exercise to relieve lumbar muscle spasm, to promote the circulation of qi and blood, to improve blood circulation, to promote the absorption of inflammatory exudation, nerve root edema dissipation, and to prevent nerve root adhesion. (2) In the remission period of lumbar disc herniation, functional exercise is mainly to strengthen the strength of the lumbar back muscles and improve the function of the waist and legs. If you can adhere to this exercise for a long time, you can make the lumbar back muscle strong and powerful, and play a role in replacing the waist circumference, and can correct the bad posture of the waist, enhance the stability of the lumbar spine, and prevent the recurrence of lumbar intervertebral disc herniation. (3) Patients with lumbar disc herniation have a long medical history, and most of them have different degrees of muscle atrophy or muscle strength decline, and the strength of the lumbar back muscles is weakened or unbalanced. Local practice therapy can strengthen the contraction ability of muscles through autonomous activities, thus achieving the effect of treating and preventing muscle atrophy. (4) Functional exercise plays an important supporting role in conjunction with other treatments for lumbar disc herniation. After the surgery and manual repositioning and traction are finished and the patient is fully rested in bed, appropriate functional exercise can strengthen the strength of the lumbar back muscles and the posterior longitudinal ligament, which creates favorable conditions for further treatment of lumbar disc herniation and release of compression symptoms. It plays an important role in consolidating the therapeutic effect and reducing the recurrence rate. How to carry out functional exercise scientifically? (1) Select suitable method: The selection of suitable exercise amount and practice method is the key to ensure the efficacy of practice. Therefore, according to the patient’s age, physique and different diseases, select suitable practice method and exercise amount, vary from person to person and from disease to disease, and arrange the practice content reasonably under the guidance of doctors in order to make the practice achieve satisfactory efficacy. (2) Pay attention to the accuracy of the action: correct posture of gong practice is the guarantee that gong practice therapy can strengthen the body, incorrect posture of gong practice not only cannot play the purpose of disease prevention and elimination, but also may aggravate the original disease. Therefore, when guiding patients to practice gong, doctors should correctly explain in detail the key elements of gong practice, every move and posture should be accurate, and explain the purpose, meaning and main goal of gong practice to patients, giving full play to their subjective initiative and strengthening their confidence and patience in gong practice. (3) Strictly grasp the principle of gradual and orderly progress: the amount of exercise for practicing gong should be from little to much, the amplitude from small to large, and the time from short to long, and the principle of gradual and orderly progress should be strictly grasped, so that the pain will not be aggravated when practicing, or a slight reaction can be tolerated as the standard, and must not be rushed. (4) avoid cold and keep warm: the process of practicing gong should adapt to the four seasons of climate change, add and subtract clothes with the change of weather, and pay attention to keep warm when it is cold. Although there is “summer practice three volts, winter practice three nine”, but must be treated differently according to each person’s physique and the different conditions of the disease, with special attention to avoid wind and cold, in order to prevent external sensations and other concurrent symptoms. (5) perseverance, insist on practicing gong: as the saying goes, “it is easy to practice gong, it is difficult to keep gong.” It means that it is not difficult to learn how to practice gong, but it is difficult to persevere and be persistent. To obtain the expected results, we must learn the correct method of practice, insist on daily practice, monthly practice, perseverance, not three days to fish, two days to sunbathe, otherwise halfway, will be abandoned before the work.