Roller derby is a full contact sport played by two teams of five players roller skating in the same direction around an oval track. The sport began in 1935 but began to lose popularity after the 80s. In 2001, the Texas Roller Derby (TXRD) was founded, rejuvenating the sport. The sport is made up of mostly women, but men's leagues are becoming increasingly popular. There are now over 1,200 leagues around the world and it may be a sport featured in the 2020 Olympics.