Elevated resting metabolic rates (RMR, kcal/day) are a well-established mechanism for maintaining core body temperature among cold climate populations. A high degree of interindividual variation has recently been noted among circumpolar populations. To further examine RMR variability, we investigated anthropometric and metabolic differences among reindeer herders from subarctic Finland.
Resting metabolic rates, body mass, body composition, height, age, and sex were measured among 20 reindeer herders (5 females, 15 males, 20-64?years) from seven herding districts surrounding the Arctic Circle of Finland in January of 2019.
Females had a mean RMR of 1798?±?216?kcal/day and males 1753?±?503?kcal/day. When controlling for body mass and fat-free mass, females had significantly higher RMRs relative to males (P??.05). However, predictive equations significantly underestimated female RMR by a mean of 25.2%?±?5.9% (P?