Why would this be so? Over the course of a year (or 6 months equinox to equinox), there are roughly equal daylight hours and night time hours...
If we assume we work between 8-10 hours incl commute and lunch, sleep 6-8 hours, we are left with roughly 8 hours leisure time. Now for me, that's mostly at night, early morning or late afternoon in summer - but for all the shift workers I know, when they do night shift they get to go to the beach, ride in the park, and generally enjoy life in the sun. One cop friend of mine has a great tan whenever he is on night shift, which fades when he's on day shift.
It's not like these night shift workers are sleeping in darkened rooms from sunrise to sunset every day all year...
Surely it's related to meal breaks or diet variance or something - this is colon health we're talking about...
Cheers Russell C.
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