Mixed martial arts (MMA) involves physical exertion, competition, and athletes competing for pay, meeting the definition of a sport. MMA originated as a way to test martial arts and determine the toughest fighter, and has evolved into assessing the most well-rounded athlete. While seen as too violent by some, MMA has stringent safety regulations and causes few serious injuries compared to other sports. It has grown rapidly in popularity in recent years and received increasing media exposure.