Our bodies are designed to move - even our breath brings movement into our bodies. But we often think sitting is a static position. Our bodies are really an unstable dynamic equilibrium system - just like bikes are. Just image if you had to balance on a bike without moving? But once you get cycling, balancing is so much easier. So if you have in mind you are balancing when sitting this may help ease tension in your body. This also applies to standing, ideally our bodies work