Predicting 5km Time from 5x800m

you'll break 20 for sure

14:45 should be possible?

I am assuming that 5 x 800m with 90 seconds rest would be close to your 3000m meter time on a good day. So add a little to that pace. 31 10k, so take a little away from that pace and that gives you 14:45ish just like the other poster said.

LetsThink wrote:

14:45 should be possible?

I wouldn't get his hopes up about this. I could have prob run this workout and I couldn't break 15:15.

Def under 15:30

I agree, 14:45 is 12 71's with no rest, this workout is not much of an indicator and not even race distance. The 31 10k is more of an indicator so I say 15 -15:15.

you guys do realize that 31:00 is two 15:30's right? and that with that workout he should be able to run about 8:25 in the 3k, which means that he is most likely not perfectly aerobically trained, which means he probably couldn't run two 5ks 15 seconds off of his best 5k pace for a 10k..

this has assumptions but i'm gonna say 14:50 on a track

i change that to 8:30

14:50 still stands

I say 14:45-14:50 as well.

I recently ran 14:56 with a session of 2:22.7, 1:08 recovery, 2:24.0, 1:08 recovery, 2:22.2, 1:08 recovery, 2:23.8, 1:12 recovery, 2:23.6, 1:09 recovery, 2:22.0 a few weeks out. His workout is much faster, but the rest is a little bit longer.

His workout is just not that good. If you add up his first 4 reps that comes to a two mile in 9:14. McMillan converts a 9:14 2M to a 14:59 5k and I think it is a stretch to assume he can even run a 9:14 2M based on this workout. He is also slowing down on reps 3 and 4. If he was doing 1,200's he would slow down more, miles even more and this is with rest. What is going to happen with no rest? The 5k gets really tough on laps 8,9 and 10 and I don't think he has the strength to maintain 71's for 12 laps if he is running 70's for 800's with rest. 15:00 would be a good effort for this guy.

somewhere in the 14:50-15:10 range.

Guys, 15.30 back to back, and you are questioning whether he can break 15 minutes. Of course he will, or at least he should. He avg. 2.17/8 there for the 5 x 800m.

He finished off with a 2.14, suggesting he is more of a speed man anyhow. Plus said he wasn't all out.

14.35/45 easy. Go off at this pace.

Do 4 x 1 mile with 90 secs

That is the 5km predictor

Or just make up a time for your 5km like with your 10km

No frickin way he can run 14:35 based on this workout....he gets tired with rest what is he going to do with no rest???

15 mins x 2 + 1 min = 31 min 10km

Aim to crack 15

Or you could tell us what your 5km pr is because that's really the best guide

This (or any other) interval workout will never predict your time nearly as well as a recent race performance, especially if you are trying to use a longer performance (10K) to predict a shorter one (5K).

Just enter your 10K into McMillan or a similar calculator and see what it says (probably 14:50 to 14:55). That will suggest a realistic pace. Trying to compare your 800 workout to that of others\' will only throw you off track.

When is the race? Please let us know how it turns out.

to start it is a 3k session. but i suppose a average would be 2;18 which is 69 sec laps which equates to a 8;37 3k.

8:37 plus 6 mins which is used to find 5k pb potential = 14:37

it would have been more benfitial if actually did a 5k session though

Thank you for messages. Hopefully I will crack 20 minutes as someone posted. My PR is 14.51, so would be nice to better that, just unsure if that is a realistic target at present.

The 10km time recently was just under 31 minutes, 30.51.

As for the session, I deliberately backed off on the 2nd, 3rd, efforts as I wanted them to feel slightly more relaxed, then pushed on the 4th and 5th effort. I also was wearing racing flats, instead of spikes.

Race is not for a while so will let you know how it turns out.

Thanks again for comments and suggestions.

I thought I would post and let those of you who commented, that I raced yesterday and ran 14.42 for 5km.

Thanks again for the suggestions.

Far out.

so when posting something like this, throw out the best and worst times, and average the rest, and that'll put u in the neighborhood. 14:45-50, and thats what u did.