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Oct 2018
12:49pm, 10 Oct 2018
150 posts
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icenutter
I've seen this before if someone has been plodding then tries to up the pace, they get stuck at tempo pace. Key is to change running form rather than rolling into it.
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Oct 2018
2:00pm, 10 Oct 2018
1,408 posts
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J2R
Actually no, the odd thing is that it tends to level out way below my maximum heart rate, in fact way below the kind of heart rate I would see towards the end of a 5K. So for example, yesterday I maxed out at 163bpm, where I will often see 172bpm at the end of a fast 5K. It's as if the pace I'm going out (4:30 pace yesterday) makes me draw on some different resource.
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Oct 2018
2:07pm, 10 Oct 2018
863 posts
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puzzler
Is this with OHR or a strap? If the former it could be cadence lock
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Oct 2018
2:19pm, 10 Oct 2018
1,409 posts
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J2R
It's with a strap. You can get cadence lock with a strap, too, but this isn't it - my cadence would be more like 190 for that run.
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Oct 2018
2:22pm, 10 Oct 2018
5,802 posts
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larkim
It wouldn't surprise me at all if the body said "OK, so you want to work hard, I'll start ramping up the HR and keep going" and then a few moments later the body says "Oh, I'd overestimated how far you wanted to go, I can back HR down a bit".
Though probably the body doesn't work like that!
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Oct 2018
2:26pm, 10 Oct 2018
13 posts
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Markoid
When you do a manual max HR test, you are normally required to do a series of hard efforts. A series of ever increasing peaks, with small troughs, so each effort builds on an already elevated HR.
Basically, your HR won't go higher than it needs to. So, for a short segment it just won't need to work hard enough to max out. Whereas, on a 5k, you're running hard for 17/18/19 minutes wish a final hard push at the end - ergo maximal.
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Oct 2018
2:27pm, 10 Oct 2018
14 posts
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Markoid
Posting so that I have 14 posts and not 13, as I have an OCD.
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Oct 2018
3:11pm, 10 Oct 2018
395 posts
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SSLHP (Shoes smell like horse piss)
what's wrong with 13?
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Oct 2018
3:30pm, 10 Oct 2018
396 posts
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SSLHP (Shoes smell like horse piss)
It all just highlights how you shouldn't rely totally on training to HR. Focusing on breathing rate is helpful too
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Oct 2018
3:31pm, 10 Oct 2018
1,410 posts
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J2R
Markoid, your explanation seems sound. It seems plausible that for that duration, I don't actually require a higher heart rate, particularly as it's probably 50% anaerobic anyway. Just a little puzzled by the actual drop-off in heart rate, but it's not much.
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Daniels Running Formula. The Definitive Wire.
Jul 2023