Altered brown fat thermoregulation and enhanced cold-induced thermogenesis in young, healthy, winter-swimming men.

ABSTRACT: The Scandinavian winter-swimming culture combines brief dips in cold water with hot sauna sessions, with conceivable effects on body temperature. We study thermogenic brown adipose tissue (BAT) in experienced winter-swimming men performing this activity 2-3 times per week. Our data suggest a lower thermal comfort state in the winter swimmers compared with controls, with a lower core temperature and absence of BAT activity. In response to cold, we observe greater increases in cold-induced thermogenesis and supraclavicular skin temperature in the winter swimmers, whereas BAT glucose uptake and muscle activity increase similarly to those of the controls. All subjects demonstrate nocturnal reduction in supraclavicular skin temperature, whereas a distinct peak occurs at 4:30-5:30 a.m. in the wi

SUBMITTER: Soberg S 

PROVIDER: S-EPMC8561167 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature