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From Fellrnr.com, Running tips
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=Important caveats=
The calculations of maximum pace make lots of assumptions. This means that the pace indicated may not be safe.
* This is the maximum pace based on the limits of heat; there are other limiting factors that mean you may not be able to achieve these paces.
* Your running efficiency may be different to the average. A higher efficiency will produce less heat at a given pace, a lower efficiency will produce more heat.
* The only air movement is assumed to be from running through still air.
* It is possible to actively cool off with ice, which will allow you to tolerate higher temperatures.
* Any direct sun will increase the heat stress and dark clothing will make this worse.
=Heat limited pace table=
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