Running on the treadmill at a constant speed for 30 minutes every day is the healthiest ... After 30 minutes, walking slowly on the treadmill at a speed of 2.0KM/H 10 minute is conducive to relaxing muscles, so that muscles do not rebound and feel sore. But you must wear professional sports shoes when running. Because the treadmill exerts a great rebound force on your feet, it is easy to cause slight shock damage to the bones of your feet. If it lasts for a long time, it is easy to cause arthritis. Run at 6KM/h for half an hour.