..... That's a clip from The Raptors Crossing the River, when he warms up with a Rolex.

In fact, it is a manifestation of little fat. When you are young, you can straighten your arms forward and push your shoulders back, and your shoulder blades will stand out. So can one of my classmates. I have more meat than him, which is not obvious. ...

Pull-ups and static sit-ups are good for back muscles. Most people think that sit-ups and pull-ups are abdominal muscles, but they are not.

Practice abdominal muscles, keep your legs straight and flat while keeping your body upright, and try to stay still.

Push-ups and curved arm support (parallel bars) practice chest muscles.

Pullers exercise big arms.