Starting in a half kneeling position. If using a kettlebell, hold it bottoms up with both hands. If using a dumbbell, hold end to end. Your goal is to rotate the weight smoothly on each rep, making sure to not move your head or trunk throughout the movement. As you rotate around, your low back will want to arch, so really focus on core.
Perform all required reps in each direction with one leg forward, then switch legs.