Sleeping is good for overall well being. But, sleeping more than eight hours a night could lead to an early death, finds out new research. A global study led by Keele University has found that people who regularly make time for more sleep could end up with a “serious sleep disorder” that disrupts their breathing and causes an increased risk of heart disease.
Analysing data from 74 studies, the researchers concluded that excessive sleep could be a “marker” of poor health. Published in the Journal of the American Heart Association, the study examined the link between self-reported sleep, cardiovascular disease and mortality over three million participants from 1970 to 2017.
A sleep duration of ten hours is linked with 30 per cent increased risks of early death compared to sleeping for seven hours. The study also revealed a 56 per cent increased risk of stroke mortality and a 49 per cent increased risk of cardiovascular mortality for those who slept for more than eight hours.
“Our study has an important public health impact in that it shows that excessive sleep is a marker of elevated cardiovascular risk,”lead researcher Dr Chun Shing Kwok, who works at Keele University's Institute for Science and Technology in Medicine, said.
The study, which also found that poor sleep quality was associated with a 44 per cent increase in coronary heart disease, is one of many that highlight the impact sleep can have on a person’s physical health.
Last month, the University of Sydney revealed that oxygen deprivation caused by sleep apnoea could cause your brain to shrink in the regions which play an important role in memory and which are also affected by dementia.
Similarly, a recent study by the University of Glasgow found that an insufficient amount of sleep could also be detrimental to your mental health. The findings concluded that a disrupted circadian rhythm can lead to an increased possibility of developing mood disorders and lower levels of happiness.