Good quality but they fall down

I thought these would not fall down being so high waisted, but they're the exact opposite. They roll down and fall down constantly. I bought the normal size I'd buy, a large. I have curvy (not fat) hips and a "bubble" butt and I feel like they do not come up high enough in the back bc my rear end sticks out so much. These might be better for just running or walking. During the HIIT training I do which involves lots of lifting, bending, sit ups, push ups, ball slams, etc lots of movement and twisting and bending, they do not stay up well.

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