Weighted Thoracic Extension with a Foam Roller. This is one of my favorite exercises to help improve thoracic mobility. For this exercise, you’ll need a foam roller and a light or medium dumbbell.

Thoracic extension . A person needs a yoga block or foam roller for this exercise. To perform the thoracic extension: Sit on the floor. Place the block or roller on the floor behind the body, and ...

In practicing proper good-morning form, you'll reinforce thoracic extension — a flat-back, neutral-spine position — and ensure your back isn't rounding during deadlifts and squats, she says.