Very good aerobic exercise during long-distance running is very helpful for cardiopulmonary exercise. However, there is still a big difference between 800 meters and marathon. Generally speaking, 10KM is the basic threshold. Being able to run 10KM means that you have the physical conditions to participate in the marathon, but for those who usually only run 10KM, 15KM and half marathon are breakthroughs. I feel quite different. Running a full marathon is even different, especially for people who run for the first time (generally only train 10km), and the second half depends entirely on willpower. Therefore, to participate in the marathon, you should not only have enough physical preparation, but also have enough psychological preparation.
The famous marathons in China include Shanghai International Marathon, Beijing International Marathon, Xiamen International Marathon and Hongkong International Marathon. General running activities include Amway's Nutrilite Health Run and Yixing in Shenzhen every year. Now, besides some standard marathons, some international running events are gradually entering China, including Desert Marathon, Great Wall Marathon and this year's Beijing 100KM ultramarathon Run.