Anyone working 12 hour shifts is disturbing (and there's a LOT of people in a LOT of other professions that do), even if they do so by choice.<quoted text>
nurses working 12 hour shifts is disturbing and mistakes happen in the last four hours.
Get your flu shot?
One overlooked culprit in the world’s obesity epidemic may be the alarm clock, according to Till Roenneberg, a professor at the University of Munich’s Institute of Medical Psychology.
He studies “social jet lag,” a term he coined, perhaps not surprisingly, on an airplane. But unlike the jet lag you get from shifting time zones, social jet lag is the chronic clash between what our bodies need (more sleep) and what our lives demand (being on time). And his research suggests that it’s playing havoc with our biological clocks.
In a study, published in May, Roenneberg and colleagues analyzed the sleep habits of more than 65,000 adults. Two-thirds of them suffered from social jet lag, experiencing at least a one-hour disparity between how long they slept on workdays and weekends.
The researchers also found that, over the past decade, people have been going to bed later but still getting up at the same time, losing about 40 minutes of sleep on workdays. They are also spending less time outside, which could account for why their circadian rhythms have become so late.
Previous studies have linked sleep deprivation with excessive weight, but Roenneberg’s team concludes that it isn’t just how much sleep people get that matters—it’s how much they mess with their internal clocks. For every hour of social jet lag accrued, the risk of being overweight or obese rises by about 33 percent. Obesity results from a host of influences, but Roenneberg says “one contributing factor is not living according to your biological temporal needs.” No one knows the precise mechanism, but other studies suggest that lack of sleep causes higher secretions of ghrelin, the appetite hormone, and a reduction of leptin, the satiety hormone.
( From : Kalb, C. "Social Jet Lag." TheSmithsonian. Print. 1/2013)
You can tell the nice ones with some actual real compassion for humanity from the not so nice ones though (in any profession)...just as soon as they open their mouths--BIG difference in what comes out of them (respectively)!