10 Best Exercises For a Flat Stomach

2. Vertical leg lift.

The vertical leg lift is another effective step for strengthening the rectus and oblique muscles. When you lift your legs up, then almost all the muscles of the abdominal and hip joints are connected to the work.

1. Lie on the floor and lift your straight legs up, then cross your feet.
2. Place your hands behind your head, but do not pull on the neck.
3. Pull your stomach in while lifting your shoulder blades off the floor, as if you want to reach your straight legs with your chest.
4. Keep your legs in a fixed position for a few seconds.
5. Lower them, and repeat the exercise for 1-3 sets, 12-16 reps.