Rotate through the core to wake up the obliques.
Turn from the waist while keeping your hips facing forward. Slow and controlled, no jerking.
Turning your torso side to side while your hips stay planted takes the obliques through their signature job, rotating the trunk, with the rest of the core stabilising the column as you move. Done slow and controlled, it doubles as mobility for a spine that spends all day facing one direction. It earns its place in warm-ups and beginner core work, greasing the rotational pattern before anything loaded or fast asks for it.
Waking up the obliques and restoring rotation through your trunk, which stiffens up fast with desk life. They are a warm-up and mobility drill first, use loaded rotation like cable chops when you want to build rotational strength.
Because if your hips turn with you, your spine never actually rotates and the obliques get nothing. Planting the hips forces the turn to happen through the trunk, which is the entire point of the movement.
Slow enough that you could stop at any point. Flinging side to side uses momentum, strains nothing useful and stretches nothing well. Smooth turn, brief pause at the end range, smooth return.
