Running speed depends on step size and step frequency. Too large a step can cause a lot of injuries, including pain in the hamstring and iliopsoas muscle. The pain comes from the ligament, the ligament from the hip to the tibia. When the knee bends, the ligament contracts near the knee and rubs the tibia near the top of the knee. Long-term friction can cause inflammation.
40% runners will develop iliotibial tract syndrome after five years or more of running. So don't walk too big or too small when running. When your feet land, your feet should be at the end of the center line, that is, your head and hips and feet. Keep a clear head and look straight ahead. Be especially careful when turning your head, usually starting from the top of your neck to avoid twisting unsteadily when walking.
There is no fixed running way, as long as the movements of all parts of the main body can be coordinated and smooth without causing tension, it may be an effective running action. The standard running posture is to keep the head and trunk in a straight line, the body is quite relaxed, the eyes look forward, the arms naturally droop, and the fingers stay slightly on the center line of the body. Feet move forward directly under the center of gravity of the body. After mastering these skills, you need to protect your knees in the future.