"Wheelchair Rugby is a mixed team sport for male and female quadriplegic athletes. A unique sport created by athletes with a disability, it combines elements of rugby, basketball, and handball. Players compete in teams of four to carry the ball across the opposing team's goal line. Contact between wheelchairs is permitted, and is, in fact, an integral part of the sport as players use their chairs to block and hold opponents. Wheelchair Rugby players compete in manual wheelchairs specifically designed for the sport. Players must meet minimum disability criteria and be classifiable under the sport classification rules." 

*https://www.iwrf.com