What Are the Long-Term Effects of BBL?

After getting BBL, what are implications of fat gain if all remains constant except the aging process where metabolism decreases with age? If I only receive lipo in stubborn fat areas in lower body, and I continue to exercise and eat healthy at my current levels, when my metabolism continues to decrease with age, will the body find new places in the upper body to store fat? I'm concerned that I'll transfer my fat from lower body to upper body after lipo, which poses higher health risk. Thanks!