This will be my second half marathon and it's a very flat course.
Recently I've run 17:53, 18:07, 18:09 and 18:12 twice. Also run 36:59 and 37:01 and around 37:20 three times. My first half was 1:22, but the second half was hilly with 300ft of elevation gain. I went out at 6:15 pace and was aiming for 1:21, but dropped to 6:20-6:30 pace on the hills. That was 6 months ago.
I'm debating whether to go out at 6:05 (sub 1:20) or 6:10 for 1:20.
18-flat is worth 37-mid & 1:22-mid. 37-flat for 10k is still ~1:22-flat. You're basically asking if you can/should go out at 10k pace in a half marathon. Unless you made a huge jump in fitness, breaking 1:22 is probably on the more ambitious side of the goal. 6:15 pace.
If you catch a good weather day maybe you can run in the 1:20s. But I wouldn't open faster than 6:15 through 10k.
18-flat is worth 37-mid & 1:22-mid. 37-flat for 10k is still ~1:22-flat. You're basically asking if you can/should go out at 10k pace in a half marathon. Unless you made a huge jump in fitness, breaking 1:22 is probably on the more ambitious side of the goal. 6:15 pace.
If you catch a good weather day maybe you can run in the 1:20s. But I wouldn't open faster than 6:15 through 10k.
I've improved a lot since then. The 37 flat had the first 4 miles at 5:50 before falling off the pace to 6:10. That was 6 months ago. Recently I've been able to do 4xmile in 5:45-5:55.
Anyway I'm going to go for 6:10 and see what happens.
This will be my second half marathon and it's a very flat course.
Recently I've run 17:53, 18:07, 18:09 and 18:12 twice. Also run 36:59 and 37:01 and around 37:20 three times. My first half was 1:22, but the second half was hilly with 300ft of elevation gain. I went out at 6:15 pace and was aiming for 1:21, but dropped to 6:20-6:30 pace on the hills. That was 6 months ago.
I'm debating whether to go out at 6:05 (sub 1:20) or 6:10 for 1:20.
Good rules of thumb for a runner of your fitness:
If you've recently raced a few all out 5km with an average time of 18:00min, double this time and add 30 seconds to get your approximate 10km time = 37:30min
Converting from a 10km to a half marathon time, double your 10km time and add 7-9min.
Am predicting you run 1:22-1:24. If you are determined to run that sub 1:20 give it a shot, but I would predict you could well blow up in the second half.
This will be my second half marathon and it's a very flat course.
Recently I've run 17:53, 18:07, 18:09 and 18:12 twice. Also run 36:59 and 37:01 and around 37:20 three times. My first half was 1:22, but the second half was hilly with 300ft of elevation gain. I went out at 6:15 pace and was aiming for 1:21, but dropped to 6:20-6:30 pace on the hills. That was 6 months ago.
I'm debating whether to go out at 6:05 (sub 1:20) or 6:10 for 1:20.
Good rules of thumb for a runner of your fitness:
If you've recently raced a few all out 5km with an average time of 18:00min, double this time and add 30 seconds to get your approximate 10km time = 37:30min
Converting from a 10km to a half marathon time, double your 10km time and add 7-9min.
Am predicting you run 1:22-1:24. If you are determined to run that sub 1:20 give it a shot, but I would predict you could well blow up in the second half.
Correction for converting 5km to 10km is double and add 1min 30sec
This will be my second half marathon and it's a very flat course.
Recently I've run 17:53, 18:07, 18:09 and 18:12 twice. Also run 36:59 and 37:01 and around 37:20 three times. My first half was 1:22, but the second half was hilly with 300ft of elevation gain. I went out at 6:15 pace and was aiming for 1:21, but dropped to 6:20-6:30 pace on the hills. That was 6 months ago.
I'm debating whether to go out at 6:05 (sub 1:20) or 6:10 for 1:20.
Good rules of thumb for a runner of your fitness:
If you've recently raced a few all out 5km with an average time of 18:00min, double this time and add 30 seconds to get your approximate 10km time = 37:30min
Converting from a 10km to a half marathon time, double your 10km time and add 7-9min.
Am predicting you run 1:22-1:24. If you are determined to run that sub 1:20 give it a shot, but I would predict you could well blow up in the second half.
Ok, last post on here as it's pointless arguing.
1:24 is 6:25 pace. I have already run 1:23:09 on a hilly half 6 months ago..... and after that I ran sub 3. 1:24 is a piece of cake for me.
I know that 1:21 is in the bag. My question is should I go 6:05 or 6:10. I appreciate I haven't given enough recent data points so I can see it was pointless asking this question now.
This will be my second half marathon and it's a very flat course.
Recently I've run 17:53, 18:07, 18:09 and 18:12 twice. Also run 36:59 and 37:01 and around 37:20 three times. My first half was 1:22, but the second half was hilly with 300ft of elevation gain. I went out at 6:15 pace and was aiming for 1:21, but dropped to 6:20-6:30 pace on the hills. That was 6 months ago.
I'm debating whether to go out at 6:05 (sub 1:20) or 6:10 for 1:20.
Good rules of thumb for a runner of your fitness:
If you've recently raced a few all out 5km with an average time of 18:00min, double this time and add 30 seconds to get your approximate 10km time = 37:30min
Converting from a 10km to a half marathon time, double your 10km time and add 7-9min.
Am predicting you run 1:22-1:24. If you are determined to run that sub 1:20 give it a shot, but I would predict you could well blow up in the second half.
You add very little time from 5k to 10k and too much from the 10k to Half Marathon. No way a 15 flat 5k athlete goes 30:30 in the 10k
If you've recently raced a few all out 5km with an average time of 18:00min, double this time and add 30 seconds to get your approximate 10km time = 37:30min
Converting from a 10km to a half marathon time, double your 10km time and add 7-9min.
Am predicting you run 1:22-1:24. If you are determined to run that sub 1:20 give it a shot, but I would predict you could well blow up in the second half.
You add very little time from 5k to 10k and too much from the 10k to Half Marathon. No way a 15 flat 5k athlete goes 30:30 in the 10k
You must have missed my correction above, add 1:30 after doubling your 5km, not 30sec
18-flat is worth 37-mid & 1:22-mid. 37-flat for 10k is still ~1:22-flat. You're basically asking if you can/should go out at 10k pace in a half marathon. Unless you made a huge jump in fitness, breaking 1:22 is probably on the more ambitious side of the goal. 6:15 pace.
If you catch a good weather day maybe you can run in the 1:20s. But I wouldn't open faster than 6:15 through 10k.
I've improved a lot since then. The 37 flat had the first 4 miles at 5:50 before falling off the pace to 6:10. That was 6 months ago. Recently I've been able to do 4xmile in 5:45-5:55.
Anyway I'm going to go for 6:10 and see what happens.
I mean, go for it OP. I'm confused at what this thread has become. You said you've run a bunch of recent 5k's that predict 1:22 half marathons. 5k's aren't super half marathon specific. 4 x 1 mile isn't super half marathon specific. Pacing seems to be an issue -- dropping from 5:50 to 6:10 is a big jump. So throwing caution to the wind & going out too fast in a long distance race opens up the possibility of crashing harder than you would off of a slightly less aggressive pace. The margin for error is thin in a race where you're red lining the whole time. Going out at 6:15 pace through 10k might allow you to average 6:10 pace for the whole thing. Going out at 6:10 pace (or faster) might have you running the later miles > 6:20-6:30 pace & not running to current fitness/potential.
I've improved a lot since then. The 37 flat had the first 4 miles at 5:50 before falling off the pace to 6:10. That was 6 months ago. Recently I've been able to do 4xmile in 5:45-5:55.
Anyway I'm going to go for 6:10 and see what happens.
I mean, go for it OP. I'm confused at what this thread has become. You said you've run a bunch of recent 5k's that predict 1:22 half marathons. 5k's aren't super half marathon specific. 4 x 1 mile isn't super half marathon specific. Pacing seems to be an issue -- dropping from 5:50 to 6:10 is a big jump. So throwing caution to the wind & going out too fast in a long distance race opens up the possibility of crashing harder than you would off of a slightly less aggressive pace. The margin for error is thin in a race where you're red lining the whole time. Going out at 6:15 pace through 10k might allow you to average 6:10 pace for the whole thing. Going out at 6:10 pace (or faster) might have you running the later miles > 6:20-6:30 pace & not running to current fitness/potential.
As usual, NERunner with some solid thoughts.
And OP, what makes you think that running the first 4 miles at 5:50 and then dropping off is improvement? Sounds like that was basically another 5k race where you just kept going for a few more miles of suffering.
Given your 5K and 10K times, sub 1:20 is VERY ambitious. It does not make any sense to go out in 6:05. Go out in 6:10 and if you can close strong the last few miles, you may still break 1:20.
You already crashed running 6:15. If you were really able to run 6:05, you should have crushed the hills, because you had been running 10 seconds slower than your potential till then. Your substantial slowdown suggests that 6:15 was fairly close to your ideal half-marathon pace.
Op asks a question but doesn't want honest answers. Only wants the answer he's hoping for.it's not gonna happen bro. I run 17:10 and I'll be happy with 1:20.
OP, I’m all for going for PRs and being ambitious but I have to agree with majority here. Going through half-way in low 6-teens would be the way to approach it. If you’re feeling good and want to push closer to 6:05 for the back half then go for it. It will make for (I would bet) a faster time and more enjoyable race.
I’ve run 1:20 several times and have gotten there by starting in the 6:12-6:15 range and then being able to drop down to 5:45-5:55 in the last mile or so.
That being said, I hope you crush it. Any chance it’s the Freep?
I think people are giving OP grief based on their proposed strategy. They want to go out at sub 1:20 pace, while others have alluded to starting in the 6:10-6:15 and then dropping down later in the race (if possible).
A sure fire way to catch a ride on the struggle bus during a race is to go out too fast. OP also said it's their 2nd half-marathon so I think others are trying to give advice so OP doesn't have to learn the hard way.
Either way we are all looking forward to the outcome.