You’ve heard it plenty of times before: Adults should spend at least seven to nine hours sleeping each night, per the recommendation of the National Sleep Foundation. But does it matter when you finally call it a day and decide to head to bed? As long as you’re getting a full night’s sleep, who cares what time you choose to hit the hay, right? Not necessarily, according to research. NBC News and ABC News analyzed two different studies that showed a correlation between bedtime, heart health and mood swings.
How a Late Bedtime May Affect Your Heart
The study, presented at the American College of Cardiology’s 58th annual Scientific Session in Orlando, analyzed men who went to sleep before midnight, in comparison to those who laid down to rest after 12 a.m. These men were younger than 61 and shared information on blood pressure, cholesterol, weight, BMI and waist circumference. They also had their arteries examined and completed a questionnaire that went over sleep patterns, such as duration and bedtime.
The men who went to bed after midnight showed more signs of arterial stiffening, which is an early symptom of heart disease – even if they slept the recommended seven to nine hours.
Dr. Daniel Jones, former president of the American Heart Association, told ABC News that while these individuals were prioritizing duration of sleep, their average bedtime was the poor sleeping habit that could be to blame.
“There are a lot of potential reasons for this causal link, [such