On a small wooden rink toward the back of Castle Sports Club in Phoenix, 20 women race around on roller skates throwing large rubber balls at each other. The balls are flying everywhere -- an exercise ...

Laura Morgan, of Tiger Bay Brawlers women's roller derby club in Cardiff - a full-contact sport played on roller skates - said she fell in love with the sport after being invited by a colleague to ...

A New York roller derby league has lost its bid to temporarily block a local ban on transgender female athletes.