What is the best 5 year lipo post-op procedure to tighten loose skin on legs and thighs?

I eat well and work-out at least 3 times a week. I had liposuction on my thighs and a buttocks reduction about 5 years ago. I have no complaints in regard to the surgery or the surgeon,but I am frustrated that in all my efforts I still have a giggle in my inner thighs and a little droop in my butt. I would like to try one of the radiofrequency treatments to tighten these areas. A professionals opinion would be greatly appreciated. Thank you for your time. Sincerely, Susan S.