Stretch involves stretching an antagonist muscle using only the tension on the agonist muscle?

Stretching an antagonist muscle through the tension of the agonist muscle is a technique often used in proprioceptive neuromuscular facilitation (PNF) stretching. In this method, the agonist muscle is contracted, which causes the antagonist muscle to relax and lengthen due to reciprocal inhibition. This allows for a deeper stretch of the antagonist without the risk of injury that might come from direct stretching. Overall, this approach enhances flexibility and range of motion effectively.