Hello dear!!Thanks for the question and provided information as well. Your results should be permanent, with exercise and a clean diet. Lifting, squats and lunges after a BBL will only help increase muscle bulk and definition and achieve a more projected buttocks.If you have any concerns, I suggest you follow up close with your plastic surgeon.Good luck :)
Long term results are usually evident after 2-3 months as the swelling subsides. Usually 30% will be lost over time.