Where does shoulder tension come from? Whether it is from sitting at the computer all day, a difficult workout routine or just day-to-day activity and stressors, many people hold tension in their shoulders. It may feel like the side of the neck is actually getting shorter. In fact, it is often the levator scapulae, the muscle that attaches the shoulder blades to the neck, tensing up and pulling in an uncomfortable manner. However, this tension can be alleviated and eliminated through a Yoga routine.