Heart rate
300 watchers
Apr 2017
2:57pm, 11 Apr 2017
6,054 posts
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paul the builder
""If elites cope well with heat (or, rather, unseasonal heat which one hasn't had the chance to acclimatise to), I imagine it's because they have a greater reserve between the heart rate they're running at and what they're capable of"" Not sure I understand this? Surely if they're racing, there is *no* reserve between the HR at which they are running and what they're capable of (for that distance). i.e. if they're keeping something in reserve, then they're being beaten by the elites that don't. If elites do manage higher than expected temperatures, I can imagine there being a lot of factors involved. Some might be: - more 'professional' preparation (e.g. actually going for warm-weather training, or deliberately heating-up your regular training by over-dressing, or going on a treadmill in a hot room) - attitudinal: they're more likely to be mentally tough than non-elites (on average) because that's a trait probably required to be an elite in the first place - heat dissipation: surface area to volume ratio more favourable in elites (in layman's terms - they're thinner) - and they're out there less long. |
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Apr 2017
2:58pm, 11 Apr 2017
6,055 posts
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paul the builder
or basically, what they just said 
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Apr 2017
3:00pm, 11 Apr 2017
380 posts
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J2R
The guy who won yesterday's race had been training in Portugal recently so had had a chance to acclimatize. Even he was a minute or two down on the time he's capable of, though. (Oh, and when I mentioned 'my best ever race placing' above, I meant for this race, not overall - I'd dearly love an edit capability in Fetch).
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Apr 2017
3:07pm, 11 Apr 2017
381 posts
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J2R
PTB, you're probably right, now I think about it. I was thinking in terms of their level of comfort at something like an HM pace. But actually they're probably running at a higher percentage of their HRmax than recreational runners are capable of. Your explanations make more sense. At least I'm pretty skinny, so I have one of those 'elite' attributes :).
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Apr 2017
3:13pm, 11 Apr 2017
1,801 posts
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larkim
Is that the way HR works for elites - they can access higher parts of their HR to extract more performance so can run closer to HRMax? I'd always assumed that the advantage that they had was being able to be more efficient within the same sorts of norms for HR, rather than simply able to get their hearts to beat faster. I think mental toughness must come into it too, but generally I find myself cardio-limited in heat, whether that is the central governor telling me I'm overdoing it for the conditions or simply the heart trying to do something to compensate for the overheating. Though I am nowhere near as mentally tough as I'd imagine an elite to be. |
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Apr 2017
4:43pm, 11 Apr 2017
382 posts
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J2R
The ability to run for long periods at a high percentage of your HRmax is certainly a marker of a high level of fitness. But yes, running economy is a massive factor, too, as is mental toughness. You probably know this but the reason why your heart rate is higher in the heat (or alternatively, that you're slower for a given heart rate) is that your heart is working overtime pumping blood to your skin capillaries to cool off. There's only so much it can do. |
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Apr 2017
4:48pm, 11 Apr 2017
1,805 posts
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larkim
I sort of guessed at that, but thanks. I read this:- "Radiation requires rerouting blood flow so more of it goes to the skin. This makes the heart beat faster and pump harder. On a hot day, it may circulate two to four times as much blood each minute as it does on a cool day" on health.harvard.edu Two to four times! No wonder it knackers me out! |
Apr 2017
12:26am, 12 Apr 2017
16,921 posts
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flanker
Somewhere, and often quoted, there's a study that shows over a marathon how many seconds per mile your speed decreases for each degree rise in temperature. I seem to remember it was suprisingly high. There's a trend in our club amongst the fast boys to do a lot of their training over-dressed and in waterproofs to acclimatise to heat and humidity. I say 'sod that for a game' when it's suggested as my primary reason for running is for enjoyment, not PBs, and I can't see any fun in that at all. I sweat enough running in -2 outside! |
Apr 2017
12:23pm, 12 Apr 2017
14,979 posts
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hellen
Hello, I am hoping for some guidance on HR. I got a Garmin 735xt end of last year and have been looking at my HR after runs rather than running to HR. I tend to run to 'feel' but find the HR data interesting. As I have got fitter and lost a bit of weight coming back from injury my recovery run pace has been around 8.45 for a HR of around 140. 10 days ago I did a 12 hour race. Took a few days off, had a few days of not many miles and have generally been taking it easy. I felt ready to do some harder sessions a few days ago and if I didn't have a HRM I would have started speed sessions BUT my HR has been about 10 beats up.....I have been running to effort still so the same easy effort but HR comes out higher. Today, for the first time I decided to look at the HR screen and try to keep my HR lower. It was a joke. I slowed right down. The run ended up being 9.20mm and HR still 10 beats up .... I was watching it , it went up on the inclines and into headwind, down when I crossed the road so I think it is working properly. So, I suppose my questions is, do I wait until my HR/ pace line up to what they did before my 12 hour race before doing speed ? Or do I accept that I trained hard and peaked for my goal race and it's going to take time to come back down so just do speed when I feel ready? |
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Apr 2017
12:25pm, 12 Apr 2017
14,980 posts
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hellen
Oh and just to add, the week before my race I had a cold so my HR was up that week.
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