The staggered-stance torso rotation drill for golf works on hip mobility and upper-back rotation in one simple movement. It may be a useful addition to your golf mobility routine.
Set up with one foot forward and the other behind you. As you rotate your torso, the staggered stance works on internal rotation in the hip of your forward leg. You may also feel your glute and hip muscles loading on that side.
The movement also trains thoracic spine rotation—the upper-back movement involved in your golf shoulder turn. Practise on both sides, moving smoothly and staying within a comfortable range.
Try 10 rotations on each side as part of your regular golf mobility routine.