-Lie on the floor and extend the legs straight up with knees crossed.
-Place your hands behind the head for support, but avoid pulling on the neck.
-Contract the abs to lift the shoulder blades off the floor, as though reaching your chest towards your feet.
-Keep the legs in a fixed position and imagine bringing your belly button towards your spine at the top of the movement.
-Lower and repeat for 1-3 sets of 12-16 reps.
-Repetitions of each exercise depend on your tolerance and condition, usually between 30-50 times.
-If you feel any pain while doing the exercises stop and ask your doctor.