Step by Step Guide
Begin lying on your back with your legs bent and feet flat on the ground. Place your hands behind your head with the elbows out to the side.
Tuck your chin toward your chest and then crunch up and forward as you lift your head off the ground. Press your belly button toward the ground as you tighten your abs.
Then, lower your head back down to the ground.
Repeat for the desired repetitions.
A common mistake is letting the legs move too much. Keep the legs stabilized by tucking the feet underneath something or having someone hold them down. This way the hip flexors and legs aren’t helping out too much and you can isolate the action to the abdominals.