After a long day of walking with a load or just a day in the office on a bad chair it is good to open the back. Try this: Either with a towel draped over a sturdy door or a good pull up bar, suspend yourself and move according to your breath. A 30 breath per hand hold is a good starting point and it will relax and release tightiness in your torso arms and lower body if you allow the body to unwind from the point of hold. Enjoy.