Yes, your running posture is incorrect. Correct posture when running: Keep your head and shoulders stable. Keep your head facing forward, do not lean forward, and keep your eyes focused forward. Relax your shoulders appropriately and avoid holding your chest. The arm swing should be forward and backward with the shoulder as the axis, and the range of left and right movements should not exceed the midline of the body. Fingers, wrists, and arms should be relaxed, and the elbow joint angle should be approximately 90 degrees. Keep your waist naturally upright and not too straight. Slightly tense your muscles, maintain your trunk posture, and pay attention to cushioning the impact of your feet landing. Swing your thighs and knees forward, not up. Any lateral movement of the legs is unnecessary and can easily cause knee joint injuries, so the thighs must be swung forward. Your feet should rest about a foot in front of your body, close to the midline. The calf should not be stretched too far to avoid strain on the Achilles tendon due to excessive force. At the same time, pay attention to the cushioning of the calf muscles and Achilles tendon when landing. When landing, the calf should actively push the ground backward to make the body move forward actively. In addition, the calf swing direction should be in the correct direction, and the feet should be pointed forward as much as possible, and should not turn outward or backward, otherwise the knee and ankle joints will be easily injured. If you take too long a step and extend your calf too far, your heel will hit the ground, causing a braking reaction force, which will cause serious damage to your bones and joints. When landing correctly, land on the middle of the foot and allow the impact to be quickly distributed to the entire foot. In the early stages of exercise, the running speed should be as fast as there is no discomfort, and the distance should be as long as there is no strenuous feeling. You may experience muscle pain in your lower limbs after running. This is a normal reaction and will disappear after a few days of exercise.