Keep moving. It makes sense. Everything else we encounter is basically a "process:" nature, time, biology, psychology. So, in order to be in tune with the environment in which we live, we should always be flowing, moving, changing. We must be fluid, (mind, body, soul), at all times.
A stagnant pool is dead energy. A rigid mind is a boulder. Our bodies need to be flexible & limber. Stillness when we meditate, but when we meditate, the ENERGY IS ALWAYS FLOWING!