Hi ,
It looks like you're using an ad blocker.



The revenue generated from the adverts on the site is a critical part of our funding - and it's because of these ads that I can offer the site for free. But using the site for free AND blocking the ads doesn't feel like a great thing to do, which is why this box is so large and inconvenient. Some sites will completely block your access, but I'm not doing that - I'm appealing to your good nature instead. Did you know that you can allow ads for specific sites, whilst still blocking them on others?

Thanks,
Ian Williams aka Fetch

F'Laps - Saturday 5th July

Join in with our challenge this Saturday. Run a set distance every hour until you can't run any more!
or for an ad-free Fetcheveryone experience!

Heart rate

1 lurker | 301 watchers
Jun 2017
2:50pm, 9 Jun 2017
2,176 posts
  • Quote
  • Pin
larkim
Surely that logic only holds to a point though? If you accept that HR drift from a certain point in time is inevitable, it would mean that for an ultra runner they would be guaranteeing hitting close to 5k HRs by the end if they paced things correctly, which I'm sure isn't the case. Or to put it another way, can you stop drift though cooling / hydrating? And where does drift max out at?

Maybe in Steve's case (his fetch log of it is here btw - fetcheveryone.com/t-13850232 ) he benefitted from the first chunk of the race being up hill, so the "benefit" of the flatter (!) section in the second half of comrades allowed him to actually be putting in a lower effort overall for the same heart rate but also a consistent pace?
Jun 2017
2:51pm, 9 Jun 2017
28,200 posts
  • Quote
  • Pin
GlennR
Here are my stats from that half marathon, in case they're of interest. You can tell where the ups are on the route from the occasional rise in heart rate. Those of you who can run at a decent pace can adjust for your own similar numbers.

Split Summary

====

1) - 0.03m - 58(30:25/m) - 87bpm avge - 110bpm max - 2cal

2) - 1m - 9:36(9:36/m) - 142bpm avge - 162bpm max - 137cal

3) - 1m - 8:19(8:19/m) - 141bpm avge - 155bpm max - 139cal

4) - 1m - 8:29(8:29/m) - 144bpm avge - 147bpm max - 140cal

5) - 1m - 8:50(8:50/m) - 147bpm avge - 152bpm max - 139cal

6) - 1m - 8:28(8:28/m) - 145bpm avge - 153bpm max - 141cal

7) - 1m - 8:17(8:17/m) - 146bpm avge - 152bpm max - 139cal

8) - 1m - 8:25(8:25/m) - 145bpm avge - 147bpm max - 140cal

9) - 1m - 8:27(8:27/m) - 145bpm avge - 148bpm max - 139cal

10) - 1m - 8:45(8:45/m) - 148bpm avge - 152bpm max - 141cal

11) - 1m - 8:28(8:28/m) - 149bpm avge - 151bpm max - 139cal

12) - 1m - 8:20(8:20/m) - 148bpm avge - 151bpm max - 139cal

13) - 1m - 8:19(8:19/m) - 150bpm avge - 152bpm max - 140cal

14) - 1m - 8:09(8:09/m) - 150bpm avge - 155bpm max - 140cal

15) - 0.15m - 1:01(6:59/m) - 157bpm avge - 160bpm max - 19cal
J2R
Jun 2017
2:52pm, 9 Jun 2017
565 posts
  • Quote
  • Pin
J2R
SSLHP, I find that cardiac drift thing doesn't happen to me, at least not in half marathons, which is the furthest I've raced since starting to use a heart rate monitor. I tend to get up to a heart rate of 87-90% after a couple of miles and then stick there, except for a little surge at the end with a finishing sprint.
Jun 2017
2:56pm, 9 Jun 2017
13,742 posts
  • Quote
  • Pin
Dvorak
Given how nearly everyone posts positive splits in a marathon, often massive ones, perhaps that could be used in one's favour by starting at below target heartrate which allows for it drifting up to that. Which, SSLHP, you might view as building underperformance and I'd view at sensible pacing. Based on me, I reckon that for every second I run too fast in the early part of the race, I'll lose two in the latter part.

All complicated by the fact that raceday HR tends to a few beats higher for the same effort than training HR.
Jun 2017
3:02pm, 9 Jun 2017
2,177 posts
  • Quote
  • Pin
larkim
A few beats higher for the same effort than training? I find the opposite, with training effort (for which I'm subtituting pace) able to be achieved for a few beats less in a race? Or am I misunderstanding?
Jun 2017
3:08pm, 9 Jun 2017
556 posts
  • Quote
  • Pin
Dillthedog57
I find the same Larkim, my race heart rate tends to be a bit lower. Especially once I get past the nervous start!
Jun 2017
3:34pm, 9 Jun 2017
2,178 posts
  • Quote
  • Pin
larkim
I usually put it down to the positive impact of a taper / rest. Because I'm usually buzzing with adrenaline and caffiene at the same time!
Jun 2017
3:44pm, 9 Jun 2017
273 posts
  • Quote
  • Pin
SSLHP (Shoes smell like horse piss)
I never use HR in a race so don't have those stats, but I do use it in aerobic marathon training and I can keep my HR constant for about 10 -12 miles then it starts to creep up for the same pace/effort (from, say 136 to 139/140) over the next 8-10 miles.

I know in the P & D book they say that if using HR, to start of at the lower end of your zone to allow for the drift later on.

I don't know, but I would guess that the elites who run pretty much a constant pace throughout a marathon have a HR higher in the last miles compared to the early ones.
Jun 2017
4:01pm, 9 Jun 2017
557 posts
  • Quote
  • Pin
Dillthedog57
If your heart rate doesn't go up near the end, you aren't trying hard enough!
Jun 2017
6:15pm, 9 Jun 2017
45 posts
  • Quote
  • Pin
Training Log
I have neg'd my last 4 marathons using a heart rate monitor.
First half <85% then let it rise as pace starts dropping off soon after.
True max is a shade over 200 mark but can not get it over 185 without a silly effort at the end of a marathon.

About This Thread

Maintained by Elderberry
Everything you need to know about training with a heart rate monitor. Remember the motto "I can maintain a fast pace over the race distance because I am an Endurance God". Mind the trap door....

Gobi lurks here, but for his advice you must first speak his name. Ask and you shall receive.

A quote:

"The area between the top of the aerobic threshold and anaerobic threshold is somewhat of a no mans land of fitness. It is a mix of aerobic and anaerobic states. For the amount of effort the athlete puts forth, not a whole lot of fitness is produced. It does not train the aerobic or anaerobic energy system to a high degree. This area does have its place in training; it is just not in base season. Unfortunately this area is where I find a lot of athletes spending the majority of their seasons, which retards aerobic development. The athletes heart rate shoots up to this zone with little power or speed being produced when it gets there." Matt Russ, US International Coach
  • Show full description...

Related Threads

  • heart
  • training
  • vdot

Report This Content

You can report any content you believe to be unsafe. Please let me know why you believe this content is unsafe by choosing a category below.



Thank you for your report. The content will be assessed as soon as possible.










Back To Top

Tag A User

To tag a user, start typing their name here:
X

Free training & racing tools for runners, cyclists, swimmers & walkers.

Fetcheveryone lets you analyse your training, find races, plot routes, chat in our forum, get advice, play games - and more! Nothing is behind a paywall, and it'll stay that way thanks to our awesome community!
Get Started
Click here to join 114,480 Fetchies!
Already a Fetchie? Sign in here