The two most common types of PNF stretching are the "contract-relax" and "contract-relax-agonist-contract" methods. The contract-relax method involves putting a muscle into a stretched position ...

“PNF works by lengthening the muscle to its maximum capacity through natural reflexes which allow the muscles to fully relax,” says Emily Chadwick-Vint, a trainer from the EvolveYou ap ...