Tilt back, twist hard, obliques lit.
Turn from your ribcage and keep your chest tall, don't just swing your arms.
Holding a leaned-back position on a decline bench with your feet lifted keeps your abs loaded isometrically before you even twist, then each rotation hands the work to your obliques. The bench locks your lower body in place better than the floor version, so the rotation comes from your trunk instead of your knees wagging side to side. It is a dense oblique move, a hold plus rotation in every second of the set.
Obliques through the rotation, with the whole core holding the leaned-back position isometrically for the entire set. You are training the twist and the hold at the same time.
Chasing touches usually turns into arm swinging. Rotate your ribcage until your shoulders genuinely face the side, and let your hands end up wherever they end up.
Yes, the setup allows a weight held at your chest once bodyweight rotations are fully controlled. Add load only when your chest stays tall and the twist still comes from your trunk.
