Previous research states that runners race faster during cold weather
than in warmer temps. And there have been rumors about working out when it's super cold helping to burn more calories.
But according to Glen Haney, who also works as a certified personal trainer and exercise physiologist, it doesn't really make that big of difference:
"It is true that you burn slightly more calories in colder weather. That's because your metabolic rate increases to warm your body, and that bit of extra work means more burn," Haney begins.
"But in the context of exercise, it's just not enough to make it count. If you're working out pretty intensely, the exertion is ultimately what makes the difference—not the cold weather."
So now that you have the answer, you might want to think twice about risking hypothermia before decided to jog naked in snow.Source