How To Do A Standing Thoracic Spine Stretch – Flexibility and Posture Exercises – Wellen

Stretching the thoracic spine can help one 
maintain an upright posture in the upper body. This stretch helps elongate the upper back which 
can become rounded slouched and forward over time.   It is often recommended to those 
with neck shoulder or upper back pain.  Stand in front of a countertop
or chair with a high back. Place your hands on the counter 
or chair at shoulder width distance apart.  Back up and keep your feet
should width distance apart. Send your hips back and let
your chest sink towards the floor. Breathe normally. Reach your arms long to increase the stretch. This stretch should feel good and relaxing, not painful. Stop if you experience
any pain or discomfort. Do not arch your lower back..

As found on YouTube