The two most common types of PNF stretching are the “contract-relax” and “contract-relax-agonist-contract” methods.

However, a quick Google search might leave you overwhelmed by all the different stretching techniques ... to further stretching (called “autogenic inhibition”). The contract-relax method ...

PNF stretching was initially designed to help patients with neurological conditions ... following the isometric contraction and therefore not offer its usual level of resistance to further stretching ...