You must control the time on the treadmill, and the time should be specified according to your physical condition and physical fitness. Forty minutes is recommended. Cardiopulmonary exercise is to improve and exercise by running at variable speed. You can jog for 10 minutes first, then increase the speed and run continuously for 10 to 15 minutes. Keep running and pay attention to breathing. When you are tired, swing your arms more, instead of striding, you will be more tired. After running for more than 20 minutes, you can slow down and adjust your breathing. Of course, slowing down means walking slowly on the treadmill. After walking a song, you can adjust the slope, and the slope will be adjusted to more than 10 degrees, but the speed will not change or even slow down. After walking for eight minutes, you can slowly climb the hill and run until your physical strength reaches the limit, and then listen carefully. Don't stop. Keep running. I can't walk any further. You may be very tired. Remember to stretch, especially the legs. Come on! Nothing is impossible, but you insist.