It looks like you're new here. If you want to get involved, click one of these buttons!
I used a time trial time from today (4.2K) to predict what I should do a half marathon in and it said 1:37:58. I did a PB a month ago in 1:37:57. I would say that I have trained well for both distances (lots of short fast runs and lots of long runs) so this was impressively accurate!!
The good thing is, I feel that I held back in the 4.2K today so it may give me a bit of confidence if I do quicker next time and then attempt another Half Mara....
I reckon that it's on the fast side, but not by a great deal. It gave my predicted marathon time of 2.50 on an actual half marathon time of 1.21. At Taunton I ran the full in 2.55. Maybe I was not as fit as possible, but 5 mis is still a large jump.
I'm in a bit of a quandry now....
Been strictly following a sub-4 hour programme for the last 14 weeks for FLM and so my race day pace was supposed to be 9min miles, to go just under 4.
But my Reading HM time a few weeks ago was 1:48:41 and the predictor says I should be aiming for roughly 3:46, which would roughly 8:40 pace.....
I don't know if it's a stupid idea to change my plans with only two weeks to go until London, or to just go for it?
What do you think?
I tried the calculater but oddly I am faster than this. I train 15km-16km, but when I ran my half-marathon I was 10 minutes faster. And this was because I had some problems in the first 5km (I expected those) and on the 19th km (didn't really expect those). On the other hand, I am probably not the typical runner - I start very slow and gain speed, I tend to be approx 25% faster in my last 5km when training and keep speeding up afterwards. For some reasons it takes me 3-6km to get in to running mode and then I start enjoying and wanting to actually run and add speed to my run
I suppose the calculator is good for people who run in a standartised manner but doesan't work for everyone ...
I find that this predictor is way off.
My 5k time is 17:57 which predicts a marathon of 2:51:59
My 10k time is 38:05 which predicts a marathon time around 2:55
My actual marathon pb is 3:15 - a long way a way from sub 3 - maybe this year
I think the prediction is sound as long as you train properly for each event.In laymans terms if you training for a 10k then run a marathon you are proberly going to fall short.
Mind you I am sure I am stating the obvious and you all know this already.
this year I must say my timings have all pretty much fallen into line.
Although I've just done a 17:23 5k, which is hyping the pressure on to bring my 10k 37:27 down to a possible 36:10 cripes!!
37:27 wasn't an easy course tho...but then the 5k course wasn't an easy course either!!
Just spotted this - very interesting.
The predictor for my 10K best of 34:58 indicates a 2:40:41 marathon, my half mara best of 1:15:58 indicates 2:38:23 for marathon. My actual best is 2:46:00, suggesting I underachieved at the full distance. I must say I have always trained appropriately, so perhaps I just don't get the distance, so to speak, or have been too cautious. This is now academic, as the aforementioned half was in 1990, the marathon in 1991, and the 10K in 1994 (age 39).
whoops...didn't realise the rw one was different to the macmillan, as my timings/predictions above are from that...
am currently in the great position fitness going well/non injuries of knowing my 5mile pb will be shattered next race out and that the next flat 10k should mean a new pb too.
this is the good time of running!
I just tried using the calculator to predict my time for the forthcoming marathon in Berlin, which will be my 6th marathon.
Funny thing is, whether I use my PB on 10K or half marathon (30:59 and 1:08:22 respectively), I get the EXACT same marathon time! (2:22:32)
So, I don't know yet how accurate the calculator is in my case, but it certainly seems consistent with my different PB's
I can run a mile in a little under 5 minutes... so it says I could potentially with training do a marathon in the 2:30s region. I swear one day I will do this and better it!... I believe now - thanks probably innacuarte calculator, you always believed in me.
I recall when this subject last came up 3 or so years ago the discovery was that the faster you were the more accurate it was likely to be.