It should be normal. Leg press is also a slow process, so don't rush for success. We should press it slowly step by step. Abdominal muscles are mainly exercised by sit-ups and leg lifts. If you have time, you can go to the gym to exercise with special equipment. During exercise, you can eat more foods rich in protein, such as beef, milk, eggs, etc., which is very helpful for muscle growth. I hope my answer can help you.