How does the heat affect your running?

Last week, I did a workout in some extreme heat and humidity on Tuesday, then bounced back with an up tempo run on Thursday in relatively cool weather.
I thought a comparison of paces between these runs was an interesting study in what the heat can do to a runner so I figured I’d share the comparison between these runs with you. It’s not meant to be a study of exactly how one can compare splits in the heat but more an illustration that, yes, it can significantly affect your running and the best thing you can do in the heat is accept slower paces.
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