In the swimming competition, except for the preliminaries, the lanes are decided by lots. The rematch, rematch and final are all allocated according to the results of previous competitions-lanes 4, 5, 3, 6, 2, 7, 1 and 8 are allocated in turn according to the results. If there is a similar result, draw lots to decide.
Because the players who occupy the middle are stronger and better players, it is normal for them to win the championship easily in the middle.
Advantage in the middle: it is beneficial to observe the situation of opponents on both sides of the middle and adjust the operational strategy.