Everyone has this action, and it is also a very common way to practice abdomen. When doing it, pay attention to keep your back straight, push your legs and upper body inward at the same time, and pay attention to the rhythm.

The second is the sitting weight-bearing swivel:

You can take a barbell or dumbbell, sit on the mat and turn your upper body left and right. In this process, pay attention to the upper body leaning back slightly, so that the muscle stimulation will be stronger.

The third is to lift the legs by hanging:

Hanging leg mainly trains the lower part of rectus abdominis, but this action requires a lot of arm strength, which is easy to cause interruption if the arm strength is insufficient.

Hold the grip as wide as possible, raise your feet as high as possible, hold it for 1-2 seconds, and then slowly lower it.