Nutrition in heat and cold

3 important questions on Nutrition in heat and cold

EE in cold and heat

cold:
-  energy expenditure in cold is 2.5 to 3 times BMR
-  human brown fat
-  metabolic rate increases due to shiffering

heat:
-  metabolic rate increases due to sweating 1L/h ~650Watt koelvermogen

Exercise in cold and altitude

cold induces diuresis (urineren) ; vessels in skin elevate blood pressure by vasoconstriction.
Heat loss through evaporation
Cold air is very dry, no water in the air > drying out very quickly.

Taste and appetite in heat

- taste depends on temperature (sweeter at high temperatures)
- thermostatic hypothesis: less appetite due to thermic effect of food

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