Heart rate
300 watchers
Apr 2015
8:42am, 10 Apr 2015
1,869 posts
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Molesy
fellrnr.com
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Apr 2015
9:59am, 10 Apr 2015
55,668 posts
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Gobi
Molesy - what is it, I won't click on a link without context ?
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Apr 2015
11:11am, 10 Apr 2015
7,061 posts
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Chrisull
Graph and information on heat vs performance. Thanks Molesy... that really is quite shocking, 20 minute difference over 40 Fahrenheit difference, for 3 hr runners, getting worse the slower you are!
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Apr 2015
1:19pm, 10 Apr 2015
55,675 posts
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Gobi
blimey that is some wild wild numbers that would just shit people up If you have trained properly then a 3hr runner should not drop off like that Now we haven't even talked about Humidity yet.... |
Apr 2015
1:36pm, 10 Apr 2015
4,920 posts
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paul the builder
But 40°F is a big temperature difference. How much *do* you think a 3hr properly trained runner should expect to be slowed by on a day that is 40°F / 22°C? I know if I rocked up to race and it was 32°C instead of the 10°C I was expecting, then the target would be out of the window on the start line.
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Apr 2015
1:48pm, 10 Apr 2015
55,678 posts
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Gobi
5 c = 40 F 22 = 71 and at 71 I would expect to run as planned 32 = 90 but I would still only be adjusting by a few minutes |
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Apr 2015
2:02pm, 10 Apr 2015
4,921 posts
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paul the builder
There's a shoddily-worded bit in my post above, where "How much *do* you think a 3hr properly trained runner should expect to be slowed by on a day that is 40°F / 22°C?" should instead have read "How much *do* you think a 3hr properly trained runner should expect to be slowed by on a day that is 40°F / 22°C hotter than was expected?" Gobi - OK, I think you're more 'robust' to heat than I am. Using your numbers, I'd probably expect 22C on the day to cost me a few minutes compared to 5C. And at 32C I'd be a mess, I could easily believe it would result in 20 minutes. Fortunately I've rarely needed to race in hot conditions. Note this is all assuming that the runner is not acclimatized to that temperature though, right? We *should* all be able to go better in hot conditions if we have a long hot summer of training in them before the target race. |
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Apr 2015
2:11pm, 10 Apr 2015
55,681 posts
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Gobi
indeed and we also haven't considered how much slower people actually run in the cold. It is possible to assume that different runners are actually at their best at different points. One mans 5C is another mans 15C When I trained for the Comrades I deliberately trained in midday heat or on the treadmill on hot days away from the aircon. I have also raced at 30 degrees and I still come back to this. Temperature is not always the enemy. The only time I got really messed up was caused by HUMIDITY |
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Apr 2015
2:16pm, 10 Apr 2015
7,068 posts
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Chrisull
Yeah I hate humidity. And when I trained in the heat two years ago on holiday, just 2 weeks of fairly easy running in stifling conditions (and a couple of hill runs), I came back and smashed my 7 mile pb on a tough course. Sudden temp changes I do not like, so if I've trained for weeks sub 10C and then it suddenly goes 20C (as it is does from time to time) I suffer until I get used to the 20C.
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Apr 2015
2:17pm, 10 Apr 2015
5,461 posts
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Garfield
I was just going to mention I don't run well in the cold. My lungs hate it and my legs take ages to warm up. I like 15C to about 22C for running...which coincides with comfortable weather in Canada. I agree, humidity is the worst!! Wasn't that Toronto that you met your humidity Waterloo?
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