Does the heat increase the amount of calories burned in a session?

Person B arrives at the station in 4 hours?

I wish cause the heat does suck and would make it slightly better

They will sweat more and lose more water weight but calories burned should be equal.

I would guess person A would be less sweaty.

No, you will not burn more calories in the heat. You will sweat more and lose more weight (water weight), but when you rehydrate, you will gain that water weight back.

Actually, you would burn more calories in the cold because your body will try harder to keep your body warm.

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I would guess person A would be less sweaty.

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depends

Can most people run the same 5k time when it's 95deg or 65deg outside? I can't. Not even close.

The body is less efficient burning energy when it's hot as hell outside.

I've always heard that the body burns more calories in cooler temperature, because it is trying to warm your muscles up.

There are numerous studies that show you burn more calories in the heat. One of the reasons is because the heart has to pump more blood to keep the body temperature down.

yeah I think I read somewhere your body has to burn calories to keep its internal temp straight so running in extreme heat and extreme cold burn more calories. Bear in mind that is all based on hearsay and nothing.