Doing 100 sit-ups every day can not reduce abdominal fat, but has a certain effect of exercising abdominal muscles.

There is no difference between upper abdominal muscles and lower abdominal muscles. In fact, whether you roll your abdomen or lift your legs on your back, you can affect a wide range of abdominal muscles, so one action is enough to exercise your abdominal muscles.

To train abdominal muscles, we must first reduce abdominal fat and then exercise abdominal muscles. Let me combine them into one:

Jump in place 1 min, supine leg lift 10 times (repeated 5 times);

Jump in place 1 min, roll belly 10 times (repeated 5 times);

Then jump in place for 20 minutes.

The important thing is that there is no rest time (if you can't stand it, you can rest for about 5 seconds)! This set of movements is a combination of low-intensity in-situ jumping and high-intensity abdominal muscle exercise, which can exercise abdominal muscles and lose weight. Do it about 3 to 5 times a week.