Sitting volleyball is a team sport in which players must keep their pelvis touching the ground at all times during a game. Teams of six compete in a smaller court with a lower net compared to able-bodied volleyball. Athletes are only allowed to lift their bodies from the floor momentarily when they receive the ball. Otherwise, bottoms stay on the ground when serving, blocking, or spiking. Sitting volleyball was introduced in 1956 by injured war veterans, and has developed into a sport enjoyed by both able-bodied and disabled athletes today.