
OH- okay. So. Both of the ab crunch chairs are fantastically optimal (the one where your feet are planted and you curl forward, and the one where you're elevated and crunch with both upper and lower body) do them both!! Do weighted deadbugs to work the TVA and for deep core strength Hollow holds for core strength Weighted suitcases Hanging leg raises And if you want to work isolated obliques, the torso twist/swivel machine is fantastic