Bend your knees and keep your feet flat on the ground, hip-width apart, and place your hands behind your head, elbows pointing outwards.
Engage your abdominal muscles and lift your upper body towards your knees, while keeping your lower back, hips, and feet firmly on the ground.
Hold this position for a moment, ensuring you're using your abs to lift your body, not your neck or shoulders.
Slowly lower your upper body back to the starting position, maintaining control and not simply dropping back down. Repeat this process for your desired number of repetitions.