Science behind Jawline Exercisers

The primary muscle responsible for the "square" or "chiseled" look at the angle of the jaw is the masseter. Like any skeletal muscle, when the masseter is subjected to resistance (via tools or specific jawline exercisers), it creates micro-tears in the muscle fibers. The Result: During recovery, the body repairs these fibers, making them thicker and stronger. This increases the volume of the muscle, which pushes out against the skin, creating a more defined jaw angle