Journal
JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL MEDICINE
Volume 53, Issue 7, Pages 716-721Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/JOM.0b013e31822282fd
Keywords
-
Categories
Funding
- Workplace Safety and Insurance Board of Ontario
- Heart and Stroke Foundation of Ontario
- Canadian Institutes of Health Research
- Ontario Ministry of Research and Innovation
- Terry Fox Foundation
- Ontario Women's Health Council/Canadian Institutes of Health Research
Ask authors/readers for more resources
Objective: To determine the effect of physical activity and sedentary behavior on melatonin levels in a group of rotating shift nurses. Methods: Physical activity and sedentary behaviors for 118 nurses were recorded during both a day shift and a night shift using activity diaries, and concentrations of urinary 6-sulfatoxymelatonin were analyzed for each shift. Results: During the day shift, energy expended in moderate- and vigorous-intensity physical activity between 3 PM and 7 AM was negatively associated with melatonin levels (P = 0.024). During the night shift, energy expended in sedentary behaviors was negatively associated with melatonin levels (P = 0.008). Conclusions: Physical activity and energy expended in sedentary behavior are inversely associated with morning urinary melatonin concentrations. Nevertheless, energy expenditure explains a relatively small amount of melatonin variation, perhaps suggesting that peak melatonin is minimally affected by these patterns of physical activity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available