Two questions really.

I'll make this short and sweet.

1) When exercising, would one burn more calories in the heat (as they would be sweating more) or in the cold (as the body would actually be working harder to try and keep the body warm while still burning calories).

2) Does staying awake longer make one burn more calories?

I know these are really odd questions. I was just curious.

Thanks!

Not sure on the second one, but I heard that you burn more calories when cold.  Well, exercising when cold anyways. 

The reasoning behind it isn't that you are working harder to stay warm though.  I guess some studies have shown you're able to work out at a higher intensity and for a longer period of time when it isn't really hot, which would make you burn more calories. 

Back to the first though...I would imagine if you're awake and active you would burn more than if you're sleeping and inactive.  BUT, sleep is VERY important...so don't deprive yourself of sleep!

1) You burn more exercising in the heat. The reasoning I've read is:

You burn a certain number of calories moving around in both situations. However, in a hot situation you have to spend extra calories cooling down. But in a cold situation you have to spend less calories cooling down.

You do burn more in the cold as opposed to a comfortable temperature when you are just standing around for long periods of time, though, because your body has to spend calories warming up since you are not moving.

2) You do burn more calories staying awake longer because you are probably sitting up, moving around, etc. HOWEVER getting at least 8 hours of sleep is important for weight loss because when you are sleeping deeply your body releases the chemicals necessary to actually break down fat. So the 'extra' calories you burn staying awake are are not worth it and in fact you would be hurting your weight loss efforts. ^^

You will technically burn more calories the longer you are awake but unless you are active the difference will only be a few calories.  I looked it up based on my stats and watching TV was 127/hr and Sleeping was 114/hr.  So yes it was more but not significant more.  As for temperature it really has no bearing on calories burned in the work out, a exercise that burns 300 calories burns that no matter what the temperature.  But it could have a relation to your metabolism in regards to the energy needed to keep warm, thus the shivering and shaking to create warmth.  I would think it would take more initially to keep you warm but once you got warmed up the exercise would be keeping you warm so after the initialcouple of minutes it would no longer take more to keep warm.  Sweating more is not related to actual calories burned, but to water weight that is replaced when you rehydrate so it would have no effect.

I would not try to stay up longer. This will do more harm then good, which was already stated in a previous post.  You need the sleep to function properly the next day, and you don't eat while you are asleep. That means calories burned with no input. 

As for hot versus cold exercise, I don't think the difference is significant enough to worry about. 

It wasn't that I was nervous, or that I was looking to improve my calorie burning abilities. I was just curious.

I think people seem to think the more they sweat, the more calories are burned but really sweating isn't always an indicator of how hard someone's working as some people don't sweat as easily. I think you lose more in the cold but I'm not sure how much of a difference it would be :\

Well I was thinking about the heat one time, and how when you sweat and it's already hot without any way to cool yourself then you would heat yourself up even more. You'd become sort of like a greenhouse, which may mean that the heat is also helping with calorie burning...sorta....does that make sense to anyone else?