There are two polar opposites: Staying still and Breaking. It's easy to visualize each end of the axis, whatever the activity.
In between is stretching.
Stretching is growth. Extending our reach. Becoming more resilient, limber and powerful. Stretching hurts a bit, and maybe leaves us just a little bit sore.
But then, tomorrow, we can stretch further than we could yesterday. Because stretching compounds.
If you're afraid of breaking, the answer isn't to stay still. No, if you're afraid of breaking, the answer is to dedicate yourself to stretching.