U. WARWICK (UK)—People who sleep less than six hours a night may be three times more likely to develop a condition that leads to diabetes and heart disease, according to new research.
A study by a team of researchers from the University of Warwick and the University at Buffalo finds short sleep duration is associated with an elevated risk of a pre-diabetic state, known as incident-impaired fasting glycaemia (IFG). Details were reported recently in the Annals of Epidemiology journal.
The condition means that your body isn’t able to regulate glucose as efficiently as it should. People with IFG have a greater risk of developing type 2 diabetes and are at an increased risk of heart disease and stroke.
The researchers looked at six years of data from 1,455 participants in the Western New York Health Study.
All participants were between the ages of 35 and 79 years old, and all completed a clinical examination that included measures of resting blood pressure, height, and weight. They also completed questionnaires about their general health and wellbeing and sleeping patterns.
“We found that short sleep—less than six hours—was associated with a significant, three-fold increased likelihood of developing IFG, compared to people who got an average of six to eight hours sleep a night,” says lead author Saverio Stranges of the Warwick Medical School.
This study is the first to look at the association between sleep duration and IFG. Stranges says there were a number of ways in which sleep loss could lead to disordered glucose metabolism.
“Previous studies have shown that short sleep duration results in a 28 percent increase in mean levels of the appetite stimulating hormone ghrelin so it can affect feeding behaviors. Other studies have also shown that a lack of sleep can decrease glucose tolerance and increases the production of cortisol, a hormone produced in response to stress.
“More research is needed but our study does suggest a very strong correlation between lack of sleep and type 2 diabetes and heart disease,” Stranges adds.
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