Many people manage to lose a lot of weight but find it difficult to lose fat from the lower abs area. The best you can do is to make sure your diet isn’t a blood sugar and insulin nightmare. The best way to avoid this is by eating protein foods with your carbohydrates and include healthy fats in your diet.
This is one of the best exercises to tone the lower abs. It’s tough, so don’t get discouraged if you can only use a light resistance and do a few.