Douluo: Can I Be Invincible Using Radio Gymnastics?

[Not joining a group + training invincible] I opened the body-training exercises and took a look. There was no origin for this body-training exercise. The words "The body is immortal" are written crookedly on every page. I couldn't sleep anyway, so I read carefully for half the night, and then I saw from the gaps in the words that there were four words "Broadcast Gymnastics" written all over the book.