Set up specifically for the Seated segmental flexion—unloaded. Use a stable seated position and keep the pelvis still. Keep resistance intentionally low so position—not load—is the challenge.

Tuck the chin and slowly round down one spinal segment at a time, letting the weight move toward the feet.

Use this version to make the position repeatable before adding range, load, or speed.

Stop at a comfortable controlled depth, then reverse the sequence smoothly from the low back to the head. Use a range you can reverse smoothly.