What is my estimated 3k time, so that I know what splits to go out in? I have just done a session of 8x400m with 90 second rest in (69,71,71,70,70,67,67,61). The session felt pretty easy, which is why my last rep was so fast.
Never run a 3000m before, Pbs are: 800: 2:07 5k 17:20