Recovering fatigue happens in between quarters. Each player has a single six-sided dice rolled for them, to which the bonus from their Endurance attribute is added (-1 for every integer below 5, +1 for every integer above 7). If the result is above 4, the player recovers either 10% (after the first and third quarters) or 20% (after the second quarter).
Each 10% of fatigue lowers each of the other five main attributes by 1 during the match. Once a player’s fatigue rises above 90%, that player benches himself and can no longer participate in play until he rests and recovers. Note that this can mean that fatigue can sometimes go over 100%.