Moving in your 'Natural Time' is one of Nia's principles. It's about moving with ease in your own time and in your way, like a fluid dance between your joints, digits and space.
Nia Technique is based on nine movement forms and one of them is Yoga. Here is a video of a Yoga instructor that really shows how to move in your natural time. The voice over says, "If (you are) not comfortable it's going to make everything a whole lot less fun."
If what you are doing is "fun" or pleasurable, it means you're more likely to do something in the long run.
Watch, Move and Enjoy!