Lack of sleep 'kills a man's sex drive'

Workaholic men, please note -- make sure that you get adequate sleep everyday, for a study says that lack of shut-eye can kill your sexual desire.

Researchers at the University of Chicago have found that men with poor sleep patterns have significantly lower levels of testosterone, which results in a lack of sex drive, 'The Daily Telegraph' reported.

According to the researchers, reduced levels of the hormone can bring a host of other negative consequences for young men -- they can fail to build enough strength through muscle mass and bone density, leading to low energy levels, poor concentration and fatigue.

In their study, the researchers found men who get less than five hours sleep a night for a week or longer suffer have far less levels of testosterone than those who get a good night's rest.

Their study, found that the levels of the hormone are reduced dramatically to levels more akin to someone 15 years older, the 'Journal of the American Medical Association' said.

"Low testosterone levels are associated with reduced wellbeing and vigour, which may also occur as a consequence of sleep loss. As research progresses, low sleep duration and poor sleep quality are increasingly recognised as endocrine disrupters," said Prof Eve Van Cauter, who led the study.

The study subjected 10 young men, with an average age 24 who were lean and in good health, to a number of "rigorous tests". These tests screened for endocrine or psychiatric disorders and sleep problems.

The men then spent three nights in a laboratory sleeping for up to 10 hours. Then over the following eight nights they slept for less than 5 hours.

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