Sleeping less than six hours or more than nine hours each night may significantly impact cardiovascular health, suggests a new study.
As part of a meta-analysis, presented at the European Society of Cardiology Congress this week, researchers examined data from 11 prospective studies that included more than 1 million adults, to investigate the possible relationship between duration of daily sleep and morbidity or mortality from cardiovascular disease.
They found that compared to adults who slept six to nine hours a night, those who slept for less than six hours had an 11 per cent greater risk of cardiovascular disease (CVD) and cardiovascular mortality, while those who slept more than nine hours had more than 30 per cent greater risk.
“Having the odd short night or lie-in is unlikely to be detrimental to health, but evidence is accumulating that prolonged nightly sleep deprivation or excessive sleeping should be avoided,”said study author Dr Epameinondas Fountas of the Onassis Cardiac Surgery Centre, Athens, Greece.
The authors noted that previous research has identified conflicting data about the impact of sleep deprivation or excess sleep on morbidity and mortality from cardiovascular disease. Dr Fountas noted a strength of the current analysis is that only prospective studies were included.