Characterizing the modern light environment and its influence on circadian rhythms.

ABSTRACT: Humans have largely supplanted natural light cycles with a variety of electric light sources and schedules misaligned with day-night cycles. Circadian disruption has been linked to a number of disease processes, but the extent of circadian disruption among the population is unknown. In this study, we measured light exposure and wrist temperature among residents of an urban area during each of the four seasons, as well as light illuminance in nearby outdoor locations. Daily light exposure was significantly lower for individuals, compared to outdoor light sensors, across all four seasons. There was also little seasonal variation in the realized photoperiod experienced by individuals, with the only significant difference occurring between winter and summer. We tested the hypothesis that diffe

SUBMITTER: Khodasevich D 

PROVIDER: S-EPMC8292753 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature