梅子折回，10K return

1K 05:30.5 11K 05:33.7
2K 05:17.2 12K 05:48.6
3K 04:45.1 13K 05:22.1
4K 04:48.3 14K 05:38.0
5K 05:14.8 15K 05:24.3
6K 05:26.3 16K 05:19.8
7K 04:55.0 17K 05:24.1
8K 04:59.7 18K 05:05.2
9K 05:20.6 19K 05:04.9
10K 06:01.6 20K 05:05.6

Split 52:19.1 53:46.3