Decades of research has shown that chronic short sleep is associated with increased risk of clogged arteries, heart disease, and early mortality.
A new study in the monthly peer-reviewed journal Experimental Physiology has a theory on why lack of sleep increases susceptibility to heart disease.
A 2011 study published in the European Heart Journal analyzed the sleep patterns of almost 475,000 people over 25 years and found that short sleepers had a 48% increased risk of developing or dying from coronary heart disease and a 15% greater risk of developing or dying from stroke. It can have psychological effects too. “The relationship between sleep and mood is complex, because disrupted sleep can lead to emotional changes, clinical depression or anxiety, but these conditions can also compound or further disrupt sleep,” the National Sleep Foundation added.So people prone to depression and anxiety can also end up oversleeping.
An individual that sleeps on average less than 6 hours per night has a 10% higher mortality risk than someone sleeping between 7 and 9 hours. Research published last year suggests people should get between 6 and 8 hours sleep. Epameinondas Fountas, cardiology specialty registrar at the Onassis Cardiac Surgery Centre in Athens, Greece, said that’s a “sweet spot” and the most beneficial for a healthy heart.
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