As simple as this exercise may look, it is by far one of the best calisthenic ab exercises you can do. This exercise builds strength, stability, and helps develop total body control.
This exercise is essential for improving the strength of your lower abs as well as your hip flexor strength. This movement builds “compression” strength – which is the ability to bring your legs and torso closer together.
This reverse crunch is performed by lying in a supine position (on your back) and lifting and drawing your legs towards your chest. To perform the full range of motion, your knees should touch your elbows.