My friend is an avid mountain biker, year-round. We were talking about dressing for the cold, and he told me that his hands and feet get freezing cold in the winter, despite wearing quality hand and footwear.

I suggested that his core temperature was too low, and if he kept his head and torso warmer, his extremities would warm up. He disagreed, saying that while biking his core temperature is so warm that he sweats profusely while his extremities freeze. Apparently the guys he bikes with seem to all have the same issue.

I guess I assumed that if you're sweating, that means your core temperature is warm. Maybe too warm.

He says he tends to dress pretty light, and seems to understand layers, etc.

I don't usually do anything as strenuous as he does, but I tend to stay warm outside. If I start to sweat, I remove a layer or ventilate, but my hands and feet tend to still stay warm.

What suggestions do you all have?

Thanks,

David