Many of these are yoga positions. Work to achieve them slowly. ~ Muscle assisted shoulder stretches: tricep stretch, one arm over the head, both arms over the head, cow face yoga position, grab an elbow be.
Infographic: Why Prolonged Sitting & Standing Are Bad For You Sitting too much will probably shorten your life. Entrepreneurs sit a lot. No wonder recently this new smart cushion Darma became instantly popular on Kickstarter.