It is said that it is helpful for waist and abdomen strength (because it is usually used when shouting loudly), and the most important thing for human strength is to use waist and abdomen strength. By the way, holding your breath is not conducive to your waist and abdomen, which is the smoothest in the process of exhaling. Wait, you still let the tracker shout? Then, in addition to the above viewpoints, shouting the number can also unify the rhythm, so that many people can coordinate together and improve work efficiency.

Please accept it, thank you!