The first, second and third period all have intervals in between them. The average interval lasts for 5 to 20 minutes, depending on the level of play. If the game goes into overtime, it can last longer than usual. When the game is tied at the end of the regulation play, a sudden death period takes place. During sudden death, the first team to score a goal wins. For the National Hockey League, the overtime period lasts five minutes during regular games. During playoff games, the overtime period lasts for 20 minutes or until a goal is scored.
Field hockey varies in length and there are two periods with an intermission in between. Each period lasts for 35 minutes and the interval in between is 5 minutes long. If the game ends in a tie, two 10-minute periods take place to determine the winner. The team with the highest score at the end of the overtime periods wins the game. On occasion, sudden-death overtime is held in field hockey. This also requires two 10-minute periods, but the first team to score is the winner.Learn more about Classic Sports