Anchor a band at hip-height, and get into a split-stance slightly ahead of the anchor point. The foot closest to the band should be your back foot (see video demo).
The back leg is doing the work here. Rotate at the hips, stretching the band as you turn, and create tension in your glutes by driving the back foot down HARD into the ground. Squeeze your glutes throughout.
Notice my grip? I’m PULLING with my non-working side and PUSHING with the hand on the working side. I do this to avoid using my arms too much.
When you want to switch sides, make sure the band is still slightly behind you.