Swimming is friendly to the knee and does not hurt the knee, but the decision to swim needs to be made based on the condition of the meniscus. For patients with meniscus injury, knee pain and swelling during the early stage of recovery, swimming is not recommended at this time, and the knee joint should be strictly braked and fully rested to avoid secondary injury from improper activities. Swimming helps to strengthen the muscle strength around the knee, while avoiding excessive pressure in the joint cavity, which is helpful for meniscus recovery. It is important to note that the intensity of exercise should not be too high, and that a gradual and measured approach is more conducive to meniscus recovery. If there is meniscus injury, it is recommended to take sufficient rest and do swimming and other sports according to your condition. If the knee pain is difficult to relieve itself, it is recommended to consult a doctor in time and follow the doctor’s instructions for standardized treatment.