Place your hands behind your head or across your chest, and ensure that your lower back remains in contact with the ground.
Inhale and then as you exhale, engage your abdominal muscles by pulling your belly button towards your spine and lift your upper body, including your shoulders and back, off the ground towards your knees.
Hold at the top of the movement for a moment, then slowly lower back down while inhaling.
Repeat this movement for your desired number of repetitions, ensuring to keep your abdominal muscles engaged and your movements controlled throughout the exercise.