Swimming at the 2016 Summer Olympics – Women's 400 metre freestyle
Records
Prior to this competition, the existing world and Olympic records were as follows. The following records were established during the competition:

Swimming at the 2016 Summer Olympics – Women's 400 metre freestyle

Section Title: Records
Table Section Text: Prior to this competition, the existing world and Olympic records were as follows. The following records were established during the competition:

Date	Round	Name	Nation	Time	Record

7 August	Heat 4	Katie Ledecky	United States	3:58.71	OR

7 August	Final	Katie Ledecky	United States	3:56.46	WR, OR

Sentence(s)

Ledecky dropped two seconds under a world-record pace, with a time in 3:56.46.

final_sentence: Ledecky dropped two seconds under a world-record pace, with a time in 3:56.46.