Day 5: : THE ROLLBACK is very challenging ...you may find yourself using your shoulders and/or neck. The #rollback helps gain spinal articulation as well as balance, coordination and abdominal strength. Remember this is an abdominal scooping exercise so, no collapsing into your body. You want to lift and pull back the abdominal muscles as you #rollback, maintaing your ball shape, while lengthening curve of the spine as you roll back off the sit bones.