Run 1500m every day.

Of course, this has nothing to do with exercising abdominal muscles.

But this is to prepare for exercising abdominal muscles.

It is best to run a few laps every day, 1500m,

Your whole muscle will make a qualitative leap.

The second move

When I sleep in bed every night,

Do sit-ups,

You must do it until you are too tired to do it.

Better sweat,

That's what happened.

The third measure

Lying in bed,

Try to reach your feet with your own hands,

Let the body be like an open and closed book,

Exercise with the waist as the support,

This is an upgraded version of sit-ups.

It's hard to do,

And you must be extremely tired when you do it.

Sedentary is much better than sit-ups.