Sleep-Wake rythms and health risks in a sub-arctic population
Optimal sleep duration in the subarctic with respect to obesity risk is 8-9 hours.
PLoS One 2013;8(2):e56756. Epub 2013 feb 15
Lack of major seasonal variations in self reported sleep-wake rhythms and chronotypes among middle aged and older people at 69 degrees North: The Tromsø Study.
Sleep Med 2012 Dec. Epub 2012 des 5
Is there a negative impact of winter on mental distress and sleeping problems in the sub-arctic? Findings from the cross-sectional population Tromso Study.
BMC Psychiatry 2012 Dec;12(1):225. Epub 2012 des 12