Efficacy of intermittent exposure to bright light for treating maladaptation to night work on a counterclockwise shift work rotation.

ABSTRACT:

Objectives

Rotating shift work is associated with adverse outcomes due to circadian misalignment, sleep curtailment, work-family conflicts, and other factors. We tested a bright light countermeasure to enhance circadian adaptation on a counterclockwise rotation schedule.

Methods

Twenty-nine adults (aged 20-40 years; 15 women) participated in a 4-week laboratory simulation with weekly counterclockwise transitions from day, to night, to evening, to day shifts. Each week consisted of five 8-hour workdays including psychomotor vigilance tests, two days off, designated 8-hour sleep episodes every day, and an assessment of circadian melatonin secretion. Participants were randomized to a treatment group (N=14), receiving intermittent bright light during work designed to facilitate

SUBMITTER: Lammers-van der Holst HM 

PROVIDER: S-EPMC8259707 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature