FirstTime10K
5k to 10K conversion. 10/28/2008 9:36PM Reply | Return to Index | Report Post
All right, so I'm running my first 10K next week. I was never a great cross runner in high school, my best time was 18 flat. I'm in great shape now, but I've been training for shorter distances for indoor season. I've put in a bit of base and I ran 18:59 in an easy 5K fun run with no competition a few weeks ago.

What might I expect in terms of a 10K time? I figure I'm strong enough to run in the very low 18s with competition in the 5K. What would that convert to? 37 or 38 minutes? Obviously the race is twice as long, but I've never gone over 5K so I'm just looking for some input.

Thanks!
the430MetricMiler
RE: 5k to 10K conversion. 10/28/2008 9:53PM - in reply to FirstTime10K Reply | Return to Index | Report Post
id say 38:15 but since its cross depending on the course it may be slower like high 38s to 39
obamacon
RE: 5k to 10K conversion. 10/28/2008 9:53PM - in reply to FirstTime10K Reply | Return to Index | Report Post
IF you are as well trained at the longer distance, a reasonable predication is:

(short race time) * (long race distance/short race distance)^1.06

5K time * (10K/5K)^1.06
5K time * (2)^1.06
5K time * 2.085

To be conservative we'll go with a 5K time of 18:30. That converts to a 38:34. 18:00 would convert to a 37:32.

Given your lack of experience at longer distances, I think breaking 38 would be a lofty goal for yourself.
FirstTime10K
RE: 5k to 10K conversion. 10/28/2008 10:10PM - in reply to FirstTime10K Reply | Return to Index | Report Post
Thanks guys. It's a road race, if that makes any difference.

I've done a 6-mile training run in 42-43 minutes before, and if what you say is true, then between 38 and 40 minutes seems like a good goal for me.
mathgod
RE: 5k to 10K conversion. 10/29/2008 9:26AM - in reply to FirstTime10K Reply | Return to Index | Report Post
These calculators are pretty accurate:

http://www.orrrc.org/calc.html