SEVEN hours of sleep is the best - and more than eight is 'hazardous' to health'

• 'Lowest mortality and morbidity is with seven hours', says sleep expert
• Those who sleep more than eight have memory and decision problems
• People who slept in Stone Age-like conditions only got 7.2 hours on average

In an age where we're busier than ever and bombarded with information 24/7, many of us complain we don't get enough sleep. But getting too much shut-eye could actually be bad for your health, an expert has warned.

'The lowest mortality and morbidity is with seven hours,' says Shawn Youngstedt, a professor at Arizona State University Phoenix who studies sleep duration. 

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Rest: Seven hours of sleep is the best amount for your health - and more could be harmful, a sleep expert has declared

'But eight hours or more has consistently been shown to be hazardous,' he told the Wall Street Journal. Read more: http://www.dailymail.co.uk/health/article-2702598/SEVEN-hours-sleep-best-eight-hazardous-health.html