No matter what kind of exercise, you can't start with too much intensity. You must do it step by step. Most people are enthusiastic at first, practice hard and are eager to achieve success. Skipping rope is a strong aerobic exercise, almost between aerobic and anaerobic, so you must do warm-up exercises and fully stretch before jogging 10 minutes. When jumping, there should be a process of low first and then strong. In addition, it is necessary to strengthen leg exercise. You are injured, which means that your muscle strength is not enough to support such a strong exercise. You can ask those who practice equipment in the gym, even those who practice every day, to start with low weight and gradually increase. All sports are like this. Don't jump as fast as possible, slow down first and then fast. In addition, the knee is the most important and fragile joint in a person, so you must keep it well before continuing. Remember!