Here's a list of Pilates exercises that improve spinal extension on the mat, Reformer, Chair, Ladder Barrel, Trapeze Table/Cadillac, and Spine Corrector.
Thoracic Extension Exercises
The Single Leg Extension Pilates Exercise–A Crucial Diagnostic
Do These 5 Back Extension Pilates For Healthy Back
8 effective Pilates back exercises at home
I absolutely love to work with the Pilates Spine Corrector! It
Pilates Plus - Pilates move of the week: Back Extension (beginner
Improving spinal mobility and strength - Pilates BodyTree
Wall Pilates Workout: Pilates Exercises for Better Stability
Pilates Workout Video for Bending and Extending Your Spine
7 Pilates Stretches for Breastfeeding Moms to Relieve Neck
7 Pilates Exercises for Lower Back Pain to Help Relieve Tension
11 Best Pilates Exercises to Strengthen Your Core - Pilates Moves