👉 Gnathism is a type of exercise that involves engaging in physical activities such as running, jumping, and other forms of high-intensity exercise. It has been popularized by the British athlete Tony Hawk, who created a series of videos where he performs various feats of strength and agility on stage. Gnathism is often associated with extreme sports like skydiving or bungee jumping, but it can also be performed for fitness and mental health purposes.