Ultimate Frisbee, or just "Ultimate", is a pretty young sport - 21 years old - which explains why it hasn't caught on like soccer or basketball yet.
Some quotes on the game:
..the team sport of the future, combining the running of soccer with the stamina of hockey and the cutting, jumping and passing of basketball...
How the game is played:
A player may not "RUN WITH THE DISC" This is called a TRAVEL and is a VIOLATION ( not a Turnover).When a Travel occurs, the defender should call "Travel," play stops and the Violating player returns to the proper spot. After a CHECK of the Disc the Violating player may resume play by attempting a pass.
About The Game
Like most team sports - this builds good explosive speed training, jumps, quick-turns, recovery and stamina. Read it all over at Singapore Ultimate