Shift work is unhealthy

Shift work has been associated with a host of health problems. The evidence is clear that getting enough sleep is important for health, and that sleep should be at night for best effect”

Shift workers getting too little sleep at the wrong time of day may be increasing their risk of diabetes and obesity, according to researchers. The team is calling for more measures to reduce the impact of shift working following the results of its study.

Changes to normal sleep meant the body struggled to control sugar levels. Some participants even developed early symptoms of diabetes within weeks.

Participants in the study started with 10 hours' sleep at night. This was followed by three weeks of disruption to their sleep and body clocks. The length of the day was extended to 28 hours, creating an effect similar to a full-time flyer constantly getting jet lag. Participants were allowed only 6.5 hours' sleep in the new 28-hour day, equivalent to 5.6 hours in a normal day. They also lived in dim light to prevent normal light resetting the body clock. During this part of the study, sugar levels in the blood were "significantly increased" immediately after a meal and during "fasting" parts of the day. The researchers showed that the hormone that lower levels of insulin - the hormone that normally controls blood sugar - were produced. Three of the participants had sugar levels which stayed so high after their meals they were classified as "pre-diabetic". They also highlighted a risk of putting on weight as the body slowed down. "The 8% drop in resting metabolic rate that we measured in our participants... translates into a 12.5-pound increase in weight over a single year," they wrote.

Dr Orfeu Buxton said: "We think these results support the findings from studies showing that, in people with a pre-diabetic condition, shift workers who stay awake at night are much more likely to progress to full-on diabetes than day workers. Since night workers often have a hard time sleeping during the day, they can face both circadian [body clock] disruption working at night and insufficient sleep during the day."

Socialist Courier has previously reported the risks of shift ork and this lqatest finding simply confirms that capitalism is bad for your health.