You can do warm-up activities before running and let your knees move apart. During the warm-up process, the knee will produce some lubricating fluid, so that the meniscus of the knee will not be directly worn when running. If there is no warm-up, then if the knees are inactive and suddenly engage in more intense activities, the knees will be worn to some extent.
Secondly, we should pay attention to adjusting the correct running posture. Although everyone thinks that running is very simple and no one can't run, in fact, many people's running posture is incorrect. Incorrect running posture will make the stress point different, so it will wear to the knee. The correct running posture is to land on the sole of your foot, and don't focus on your legs completely. This action will increase the weight of the knee.
To spread strength to all parts of the body, legs, abdomen and buttocks should have strength, and landing should be gentle, so as to play a buffering role. Moreover, wear shoes to choose professional running shoes. The soles of running shoes are soft, which can play the role of cushioning and protection, and can also reduce the burden on knees.
Another situation is that if you weigh more, such as a big fat man weighing more than 200 kilograms or even more than 300 kilograms, you should choose other ways to exercise when you lose weight. Running is not suitable for heavyweight athletes, because most of his weight will be on his knees, which will make his knees hurt more seriously.