Ladder Run

0:00 - Run 800M
6:00 - Run 400M
9:00 - Run 200M
11:00 - Run 100M
12:00 - Run 100M
13:00 - Run 200M
15:00 - Run 400M
18:00 - Run 800M

Post interval times to comments. 

Compare to 9/12/11, 12/5/11, 9/12/12, 6/14/13, 6/20/16, 6/9/17, and 3/26/19.