5 x 1k Prediction

Did you rest up for this workout, or did you do normal mileage/workouts in the 3-4 days before?

If you rested up, go out at 19:30 pace (+/- 2 or 3 seconds per mile, so 6:15-6:20). If you did it on tired legs, go out at 19:00 pace (+/- 2 or 3 seconds mile, so 6:05-6:10).

Judging by your 5x1k, I'd say you can expect low 19s and maybe high 18s. Personally, if I were you I'd probably try to go out at around 6:10 pace, and if you feel good from there, pick it up a tad bit, but don't kill yourself. 6:10 puts you right at 19:07, which definitely seems feasible for you based on your workout. I know at the very least that you should be able to blow your old PR out of the water.

Thanks for the replies. I technically did this workout on tired legs as I have had a week of really hard trail running although my legs felt oddly fresh. I think I will shoot for 6:10 for the first mile. I really like to negative split anyways so I will pick it up if feeling good. I'll try to remember to post my time once I race.

I ran a 5x1000 last Tuesday: 4:42, 4:27, 4:26, 4:25, 4:21

Would that get me under 21? I only went at 60% though, and didn't burn the first one like I tend to do and go out too fast, and it's my first of the season. (Obvi. I know I can go faster).