4 ms·

Exposure to weather conditions, hot and cold is also critical.

• collyw 9y ago
  First time I have heard that. Got any references, I would like to read more?
  • nradov 9y ago
    tu7001's comment shouldn't be down voted, it is correct. The human body has to expend energy to heat or cool itself when the ambient environment is outside a certain narrow range. Sweating burns some calories, even if you're just sitting around. When we spend our time inside climate controlled rooms then we burn fewer calories. The effect is small, but measurable. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3975627/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3975627/
• uoaei 9y ago
  Anecdote time here, but spending some time in a steam room and then entering a cold bath, and doing this 3 times or so, feels like a great cardio workout without the muscle soreness. There's definitely a lot of energy expended, particularly by the circulatory system, in keeping one's core temperature more or less stable.