Performing the: A Step-by-Step Tutorial Lying Full Leg raise
With your feet together, slowly lift your legs off the ground while keeping them straight and without bending your knees.
Continue to raise your legs until they make a 90-degree angle with your body.
Hold this position for a few seconds to engage your abdominal muscles.
Slowly lower your legs back down to the starting position, making sure to keep them straight and together throughout the movement. Repeat the exercise for your desired number of repetitions.