Other strong factors include participation in a contact sport and body mass size. Falling and colliding with other people in a contact sport can also cause this fracture. Lacrosse is a full field, 10 vs 10 contact sport. Kabaddi is a contact sport originated in India. Avtar himself grew up only playing kabaddi, a traditional Indian contact sport. Kickboxing is practiced for self-defence, general fitness, or as a contact sport. Folk racing is a full contact sport like banger racing. The two meet in a rough contact sport and hit it off immediately. Roller derby is a contact sport, and injuries can occur. It is considered a contact sport but body checking is prohibited. Sanda (sometimes called sanshou) is a modern fighting method and a full contact sport. Ice hockey is a full contact sport and carries a high risk of injury. Rugby union is a contact sport that consists of two teams of fifteen players.