STRETCH REFLEX While traditional stretching methods attempt to make you more “flexible,” we work to adjust the stretch reflex. This way, the Stretch Zone Method gradually increases your active range of motion. Consider how a car seatbelt works. If pulled too quickly, the belt locks. If the belt is forced, you are just stretching the material itself, and that’s where injury happens. When a car seatbelt is pulled smoothly and controlled, the belt will fully extend. It’s the same with your body’s stretch reflex.