Wiktionary
sledge hockey
n. A version of ice hockey where the players are seated on sledges and have use of two sticks.
Wikipedia
Sledge hockey
Sledge hockey (known as sled hockey in the United States) is a sport that was designed to allow participants who have a physical disability to play the game of ice hockey. Ice sledge hockey was invented in the early 1960s in Stockholm, Sweden, at a rehabilitation centre. It is currently one of the most popular sports in the Paralympic Games.