Is it true that human basal metabolic rate increases under high temperatures? If so, why does this happen? What are the underlying biological processes that are activated in very warm climates?
I find it counterintuitive that the basal metabolic rate would increase in high heat. In cold climate body spends energy to heat it up. But with high temperature climate it seems logical to decrease the basal metabolic rate to conserve energy and avoid dissipating additional heat generated during biochemical processes within the body. Can you explain why the body actually experiences an increase in basal metabolic rate under these conditions?
I've been asked to put my prior research, here are my findings: Some articles (1) (2) says that BMR is actually become higher in heat. Sadly my expertise in medical sciences is zero, thus I cannot verify if these findings are 100% correct. These papers doesn't mention exact biological mechanisms that are activated under heat. There is beautiful picture in this paper about all heat adaptation mechanisms, but it doesn't contain any energy consumption rates for these ones.
Can anyone with real human biology knowledge point out what mechanisms consume energy and help lower body temperature?