Back training leads to hunchback, and back training helps to stand straight. !
Just using different people, don't worry, I'll explain ~
First, the hunchback of ordinary people is the physiological curvature of the spine caused by poor sitting posture. As the saying goes, the back is not straight, and such people need to practice their backs. The muscular back can produce traction in the opposite direction and correct the body, as if the body automatically put on a set of back ~
Second, what Le Jia said is suitable for people who keep fit all the year round. Because of long-term fitness, the muscles on their backs become plump and there will be some prominent bumps. Although the waist is straight, there will still be a "squat" effect due to the fitness effect. So he looks hunchbacked ~ Le Jia often works out and has a good figure. This should be the advice given to him by his fitness coach, telling him not to practice his back too well ~
As for practicing chest muscles to help you stand straight, it's sheer nonsense. . .