Una ragazza violenta (1972)

Karen wants more action out of life and quits her job at the cannery to become a skater in the roller derby. She encounters friction from the other skaters - especially Mickey, the current number one star of the team. Karen proves herself a feisty competitor but refuses to be a team player. As she skates her way to roller stardom, she incurs the wrath of jealous team members and the owner of the team.