We have fine control over our movements with our muscles. We make precise movements thanks to our nervous system’ s innervation of the muscles.
But what is connecting everything in the body like a matrix?
Connective tissue:
There are 10 times more nerve endings in our fascia than in our muscle. They are providing us feedback: we know what is going on in our body because of our nervous system’s interaction with our fascia.
If you can tell your body to relax while stretching you will get a better range of motion and health benefits.

Sources:
The anatomy of yoga
Bernie Clark