Human total, basal and activity energy expenditures are independent of ambient environmental temperature. Journal Article

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Authors: Zhang, X; Yamada, Y; Sagayama, H; Ainslie, PN; Blaak, EE; Buchowski, MS; Close, GL; Cooper, JA; Das, SK; Dugas, LR; Gurven, M; El Hamdouchi, A; Hu, S; Joonas, N; Katzmarzyk, P; Kraus, WE; Kushner, RF; Leonard, WR; Martin, CK; Meijer, EP; Neuhouser, ML; Ojiambo, RM; Pitsiladis, YP; Plasqui, G; Prentice, RL; Racette, SB; Ravussin, E; Redman, LM; Reynolds, RM; Roberts, SB; Sardinha, LB; Silva, AM; Stice, E; Urlacher, SS; Van Mil, EA; Wood, BM; Murphy-Alford, AJ; Loechl, C; Luke, AH; Rood, J; Schoeller, DA; Westerterp, KR; Wong, WW; Pontzer, H; Speakman, JR
Article Title: Human total, basal and activity energy expenditures are independent of ambient environmental temperature.
Abstract: Lower ambient temperature (T) requires greater energy expenditure to sustain body temperature. However, effects of T on human energetics may be buffered by environmental modification and behavioral compensation. We used the IAEA DLW database for adults in the USA (n = 3213) to determine the effect of T (-10 to +30°C) on TEE, basal (BEE) and activity energy expenditure (AEE) and physical activity level (PAL). There were no significant relationships (p > 0.05) between maximum, minimum and average T and TEE, BEE, AEE and PAL. After adjustment for fat-free mass, fat mass and age, statistically significant (p 0.01) relationships between TEE, BEE and T emerged in females but the effect sizes were not biologically meaningful. Temperatures inside buildings are regulated at 18-25°C independent of latitude. Hence, adults in the US modify their environments to keep TEE constant across a wide range of external ambient temperatures.
Journal Title: iScience
Publisher: Unknown  
Date Published: 2022