How do I get rid of these rolls under my bum?

Ive always had this issue no matter how small I am, so I'm guessing it's genetic but if any one has any suggestions that would reduce this, it would be greatly appreciated!
I currently do 2 days a week of hamstring/full leg workouts & 1 day of HIIT.
Thank you in advance!

Tinypic.com/r/nh08pc/9

by emmajay109 via Bodybuilding.com Forums - Female Bodybuilding