if you don't have a block, roll up a towel or blanket! Pin it! 8 Yoga poses for neck and shoulders. Wearing: Teeki northern lights pants, old tank (similar), Lululemon headband (similar). Using: Wellicious divine mat, yoga blocks.
Unlocking tight shoulders and chests are something that I focus on constantly with my yoga students, CrossFitters and training clients. Rounded shoulders and tight chest muscles have become the norm in our society as we are constantly hunched over desks.
This technique is very useful and effective. I have used it many times before. -- How to use a long yoga strap to help move your shoulders back and down - reducing stiff shoulders, sore necks and upper back pain. (Upper Back Pain)