Fire Hydrant Butt Exercises
When I was in high school I ran cross country and track all four years. During practices we would have to work on our "core exercises". One of these, called fire hydrants, worked really well on our hamstrings and butts.
To perform this butt exercise, first get down on your hands and knees. Then slowly raise one knee out the side until it is parallel with the ground. Finish by slowly lowering the leg.
Repeat 10 times on each leg.
As your muscles get stronger you will be able to do more and build more muscle.
Feel the burn.