Patients with optic neuritis generally suffer from demyelinating diseases of the central nervous system. In addition to optic neuritis, it can also affect the spinal cord, causing inflammation of the spinal cord. The nature of this disease is caused by the disorder of the body’s immune function. During the acute phase of the disease, the body is relatively weak, and the immune function is disordered; it is suitable for rest in bed. It is not recommended to engage in high-intensity exercise like running, as it is not beneficial for the recovery of the disease; this stage should focus on rest. If optic neuritis has been treated with corticosteroids and other treatments and the clinical symptoms have alleviated, and the patient's physical function has significantly recovered, it is then advisable to engage in running to exercise the body and enhance physical fitness. Participating in these physical activities can improve the patient's immune function and may prevent another attack.