4.61 How Sleep Affects Heart Health
Large research studies including nearly 500,000 people have examined how sleep affects the risk of heart attack, stroke and dying in general. Those who slept 6 hours or less per night had nearly a 50% higher risk of dying from heart disease. What is also interesting is that those who slept more than 9 hours also had a significant increase risk of dying from heart disease, almost 38% higher risk. The risk of stroke was similarly affected by the duration of sleep.
It is well known that the heart rate and blood pressure decreases at night, mostly because the Adrenaline levels are low. When people are sleep deprived, this keeps the Adrenaline level higher, even during the day time. This causes the blood pressure and heart rate to go up which is not good.