| Lap | Position | Time | Pace |
|---|---|---|---|
| 1 | 3 | 20.471 | 21/7:09.891 |
| 2 | 3 | 20.446 | 21/7:09.629 |
| 3 | 3 | 20.110 | 21/7:07.189 |
| 4 | 3 | 20.095 | 21/7:05.890 |
| 5 | 3 | 20.649 | 21/7:07.438 |
| 6 | 3 | 19.084 | 21/7:02.993 |
| 7 | 3 | 22.093 | 21/7:08.844 |
| 8 | 4 | 27.366 | 20/7:05.785 |
| 9 | 4 | 20.984 | 20/7:05.107 |
| 10 | 4 | 24.225 | 20/7:11.046 |
| 11 | 4 | 20.654 | 20/7:09.413 |
| 12 | 4 | 23.726 | 20/7:13.172 |
| 13 | 4 | 18.968 | 20/7:09.032 |
| 14 | 4 | 22.526 | 20/7:10.567 |
| 15 | 4 | 20.165 | 20/7:08.749 |
| 16 | 4 | 19.591 | 20/7:06.441 |
| 17 | 4 | 20.271 | 20/7:05.205 |
| 18 | 4 | 19.056 | 20/7:02.756 |
| 19 | 4 | 20.734 | 20/7:02.331 |
| 20 | 4 | 22.551 | 20/7:03.765 |