Place your hands behind your head, ensuring your elbows are open wide and not pulling on your neck.
Engage your abdominal muscles by drawing your belly button towards your spine, then lift your upper body, including your shoulders and back, off the floor towards your knees.
Hold this position for a moment at the top, ensuring your core remains engaged and your neck is relaxed.
Slowly lower yourself back down to the starting position and repeat the exercise for your desired amount of repetitions.