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oai:repisalud.isciii.es:20.500.12105/150582025-05-21T13:40:22Zcom_20.500.12105_2052com_20.500.12105_2051col_20.500.12105_19618

00925njm 22002777a 4500 dc Bonmatí-Carrión, María-Ángeles author Casado-Ramirez, Elvira author Moreno-Casbas, Teresa author Campos, Manuel author ModulEN Consortium author Madrid, Juan Antonio author Rol, Maria-Angeles author 2022-07-28 Human circadian rhythmicity is subjected to the internal circadian clock, the sun and social clocks (official time, social/work schedules). The discrepancy among these clocks, as occurs when official time does not match its geographical time zone, may produce circadian disruption. Western Spain (GMT+1/+2) and Portugal (GMT0/+1) share similar longitudes (sun time) but have different official times. This provides a unique opportunity to evaluate the effects of official time on circadian rhythmicity and sleep in elderly and retired populations (with no remunerated duties presumed, although other social commitments may be present) at both locations. Although both populations slept enough for their age (7-8 h), circadian robustness (e.g., interdaily stability, relative amplitude) was greater in Portugal, especially during weekdays, while greater desynchronization (both body temperature vs. motor activity and body temperature vs. light exposure) tended to occur in the Spaniards. Once corrected by GMT0, meals took place later in Spain than in Portugal, especially as the day progresses, and a possible interplay between bed/meal timings and internal desynchronization was found. Our results point to the possible deleterious effect on circadian system robustness when official time is misaligned with its geographical time zone. Biology (Basel). 2022 Jul 28;11(8):1130. 10.3390/biology11081130 2079-7737 Biology 36009758 http://hdl.handle.net/20.500.12105/15058 Living at the Wrong Time: Effects of Unmatching Official Time in Portugal and Western Spain