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May 2021
8:24am, 14 May 2021
1,807 posts
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Brunski
Here’s my 5k Pb azx, pretty much 95% max from the start.
As I said in a reply to MrG I also do quite a few tempo 5ks and they come out around 90% max.
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May 2021
11:06am, 14 May 2021
287 posts
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azx
Interesting graph Brunski. Mine looks nothing like that; it's a far more gradual incline reaching only reaching 95% MHR after 3+km.
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May 2021
11:17am, 14 May 2021
14,324 posts
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larkim
Mine takes close to a mile to reach a plateau for a 5k, your acceleration there Brunksi is incredibly rapid. Noting the drop off after about 1k, is there any chance that those early readings have gremlins in them, or is that just working hard up an incline at the start of a 5k (noting the elevation graphs below).
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May 2021
11:29am, 14 May 2021
3,629 posts
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J2R
Mine takes a fair while to climb, too. It gets slower to climb as you get older. If I'm to do a half decent time in a short race like a 5K, I have to make sure I'm really thoroughly warmed up before I start, and then it'll get up to 'working temperature' rather more quickly.
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May 2021
11:31am, 14 May 2021
1,808 posts
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Brunski
Yeah first mile is uphill, went out a bit lively and each mile split was pretty close in times despite being (net uphill/net level/net downhill). Usually 10 seconds quicker each mile works best on this 2 lap course.
It's not always such a steep graph, often the HR takes a while to get up around/over Threshold, on another day I'd have lost pace over the final miles because of going out too hard but I targeted this for a PB and was determined to hold pace.
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May 2021
11:33am, 14 May 2021
22,416 posts
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Dvorak
Nothing like bolting off uphill to raise the HR rapidly. Well, being chased by a lion, perhaps. It is a very abrup t increase though: that and the ability to sustain such a high hr are a testament to your very high fitness levels.
Interesting that there's no drop on the downhills: even when I'm pushing it, and increasing pace, I still the the hr drop a few beats.
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May 2021
11:46am, 14 May 2021
1,809 posts
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Brunski
I'm the opposite sometimes Dvorak, it's a very runable downhill and it's hard not to 'do your race' on the KM or so along the park by trying too hard to make up places.
This was the first week of my taper, so 2 weeks before a marathon and I was feeling good, normally I'd be looking at running 40 seconds slower so wouldn't be trying to maintain such an effort.
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May 2021
12:06pm, 14 May 2021
12,031 posts
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chunkywizard
pretty happy with my HR for last night's race. The bands I have in Fetch are set as end of Z2 and L/T
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May 2021
12:48pm, 14 May 2021
3,631 posts
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J2R
I have come to the conclusion that a very good method of getting a reasonable approximation to your maximum heart rate, which isn't so utterly grim as some other methods, is to run at a fast, but not flat out pace (maybe 10K pace), for a couple of miles, before accelerating to 5K pace and hitting an uphill hard and trying to maintain pace for 20-30 seconds. At the end of that, your heart rate will likely to be just 3-4 beats away from your HRmax.
Done it a couple of times now and it surprises me how high the heart rate goes. It must be the combination of being fully warmed up and already running at a reasonably high HR with the sudden extra demand.
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May 2021
12:58pm, 14 May 2021
14,333 posts
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larkim
I think my heart would explode if I tried that J2R!
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Daniels Running Formula. The Definitive Wire.
Jul 2023