Here's a list of Pilates exercises that improve spinal extension on the mat, Reformer, Chair, Ladder Barrel, Trapeze Table/Cadillac, and Spine Corrector.
30 Minute Thoracic Spine Mobility Pilates Workout
Prone spine extension on the Pilates Reformer.
11 Best Pilates Exercises to Strengthen Your Core - Pilates Moves
Wall Pilates Workout: Pilates Exercises for Better Stability
Improving spinal mobility and strength - Pilates BodyTree
Spinal Extension exercises - PILATES & YOGA STUDIO LTD
Mat Pilates Spine Corrector Back Extension Exercises
Thoracic Spine Extension and Rotation Exercise
Leg Pull: Don't Forget To Strengthen The Posterior Chain Of, 54% OFF
Improving spinal mobility and strength - Pilates BodyTree
10 Essential Pilates Exercises for Beginners • BASI™ Pilates