What is knew is not to know that proprioception is our sixth biological sense. The sense which informs the brain about the body and its relationship with the space. This was published by Sherrington in 1906 , more than one century ago. 

What is new is the knowlege that some conditions of muscle pain, imbalance and learning disabilities are consequence of proprioceptive disorders.

It is new as well, that proprioceptive disorder may be fixed and  symptoms disappear under specif proprioceptive treatment