Turn your waist. For example:
Legs apart, shoulder width, fixed; Turn your upper body left and right. Don't move above the waist, use the strength of the waist to drive.
Or, separate your feet 1.5 steps (shoulder width) and fix them. Bend down and touch the outer ankle of your right foot with the fingertip of your left hand and touch your left foot with the fingertip of your right hand.
Repeating it several times is also very effective.