Yoga poses for your upper back. This class will help to improve mobility in your thoracic spine and correct poor postural habits. It will be ideal for people practicing with restricted movement or discomfort in the upper back. It will also help to relieve muscular tension originating from prolonged periods seated in front of computers. In some of these poses yoga blocks are used to contain regions of the upper back that are prone to rounding. This can help you to re-open your upper chest and remove strain from your neck and shoulders.