In professional play, each period is 20 minutes, while amateur and youth leagues have periods that last between 15 and 20 minutes. Most other professional leagues utilize a 20-minute length, set up to balance the players' play time with their rest time. The fast implementation of 20 minutes length means it’s an insanely fast-paced and intense game but it also gives you time to rest and recover between periods. The length of the period can be different, at different levels of play and in different leagues or tournaments.
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