% pubman genre = article @article{item_3579918, title = {{Total daily energy expenditure and elevated water turnover in a small-scale semi-nomadic pastoralist society from Northern Kenya}}, author = {McGrosky, Amanda and Swanson, Zane S. and Rimbach, Rebecca and Bethancourt, Hilary and Ndiema, Emmanuel and Nzunza, Rosemary and Braun, David R. and Rosinger, Asher Y. and Pontzer, Herman}, language = {eng}, issn = {0301-4460; 1464-5033}, doi = {10.1080/03014460.2024.2310724}, year = {2024}, abstract = {{Background: Pastoralists live in challenging environments, which may be accompanied by unique activity, energy, and water requirements. Aim: Few studies have examined whether the demands of pastoralism contribute to differences in total energy expenditure (TEE) and water turnover (WT) compared to other lifestyles. Subjects and methods: Accelerometer-derived physical activity, doubly labelled water-derived TEE and WT, and anthropometric data were collected for 34 semi-nomadic Daasanach adults from three northern Kenyan communities with different levels of pastoralist activity. Daasanach TEEs and WTs were compared to those of other small-scale and industrialised populations. Results: When modelled as a function of fat-free-mass, fat-mass, age, and sex, TEE did not differ between Daasanach communities. Daasanach TEE (1564{\textendash}4172 kcal/day) was not significantly correlated with activity and 91{\textpercent} of TEEs were within the range expected for individuals from comparison populations. Mean WT did not differ between Daasanach communities; Daasanach absolute (7.54 litres/day men; 7.46 litres/day women), mass-adjusted, and TEE-adjusted WT was higher than most populations worldwide. Conclusions: The similar mass-adjusted TEE of Daasanach and industrialised populations supports the hypothesis that habitual TEE is constrained, with physically demanding lifestyles necessitating trade-offs in energy allocation. Elevated WT in the absence of elevated TEE likely reflects a demanding active lifestyle in a hot, arid climate. {\copyright} 2024 The Author(s). Published by Informa UK Limited, trading as Taylor {\&} Francis Group.}}, journal = {{Annals of Human Biology}}, volume = {51}, number = {1}, eid = {2310724}, }