Riding alone? Why did Song wear a sports bra?

Running a marathon must be non-stop If the physical protection is not in place, it is likely to be damaged. Boys, like girls, need to wear professional sports bras to protect their chests, while men actually need to protect their chests in marathon. Some marathon runners actually shed bright red blood in their chests during running, which is actually because these athletes did not use chest pads to protect their chests during the competition. Because of the continuous running of the marathon, the athlete's coat will constantly rub against his chest, leading to chest wear, and it is very likely that blood will suddenly flow out of his chest during the marathon. Imagine that the chest suddenly wears out during the game, even the athletes with higher level will affect the performance of the game. Therefore, for marathon runners, sports bras are absolutely indispensable equipment.