Daily and Seasonal Variation in Light Exposure among the Old Order Amish.

ABSTRACT: Exposure to artificial bright light in the late evening and early night, common in modern society, triggers phase delay of circadian rhythms, contributing to delayed sleep phase syndrome and seasonal affective disorder. Studying a unique population like the Old Order Amish (OOA), whose lifestyles resemble pre-industrial societies, may increase understanding of light's relationship with health. Thirty-three participants (aged 25-74, mean age 53.5; without physical or psychiatric illnesses) from an OOA community in Lancaster, PA, were assessed with wrist-worn actimeters/light loggers for at least 2 consecutive days during winter/spring (15 January-16 April) and spring/summer (14 May-10 September). Daily activity, sleep-wake cycles, and their relationship with light exposure were analyzed. Ov

SUBMITTER: Lee EE 

PROVIDER: S-EPMC7344929 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature