Why did American swimming track and field decline?

Structural fracture. The structural fracture of track and field and swimming events is the key reason for the decline of American performance. In swimming, for example, the dominance of the United States team dropped significantly, with only 1 1 as the gold medal, compared with 16 in the previous two Olympic Games. The decline in performance in the United States is not only caused by the epidemic, but also the imbalance in talent structure caused by the relatively weak absorption capacity of domestic track and field and swimming events.