Foam Roller/Rolled Up Towel Upper Back/Chest Stretch
This is a simple and relaxing exercise that effectively stretches the upper back but also influences the chest, neck, shoulders and lower back. It can be performed with a foam roller (or equivalent) but is also quite effective with a rolled up towel. Simply place the roller along your spine and balance with your knees up (feet slightly apart) and your arms stretched outwards (or upwards as in the second image). Make fine adjustments with your legs, back, neck, and arms until you find a comfortable position and simply keep this position for 3-5 minutes or as long as comfortable.