Sleep-deprived men are at greater risk of developing Type 2 diabetes. Here’s why
Source: Hindustan Times
There’s a link between insufficient sleep and the development of insulin resistance, one of the factors that cause Type 2 diabetes. A team of US researchers has discovered a biological reason for this relationship, at least in men: an imbalance between their testosterone and cortisol hormones.
“Our highly controlled sleep study showed that even one night of restricted sleep can cause insulin resistance and that we can dampen this effect by controlling levels of these two important hormones,” said senior investigator Peter Y. Liu of Los Angeles Biomedical (LA BioMed) Research Institute at Harbor-UCLA Medical Center, Torrance, California.
Insulin resistance occurs when the body does not properly use the hormone insulin. Testosterone is the main anabolic, or muscle-building, hormone, whereas cortisol – often called the “stress hormone”– helps catabolism, or breaking down energy and fat stores for use, Liu explained. Past research shows that sleep loss reduces a man’s testosterone levels and increases cortisol levels.
Liu and his fellow researchers conducted five nights of sleep studies in 34 healthy men with an average age of 33. They controlled what the subjects ate and how much they slept, giving them 10 hours of sleep the first night and restricting them to four hours of sleep the remaining nights.